42_a_driver_handbook
When the bus flashes red lights ( located at the top front and back of the bus ) , you must stop from either direction until the children are safely across the street and the lights stop flashing .

%3 0042_0001__When when[tmp] 0042_0004__flashes flashes 0042_0001__When->0042_0004__flashes [restriction] 0042_0026__until until[tmp] 0042_0001__When->0042_0026__until [scope] 0042_0002__the_0042_0003__bus the_bus 0042_0004__flashes->0042_0002__the_0042_0003__bus [arg0] 0042_0006__lights lights 0042_0004__flashes->0042_0006__lights [arg1] 0042_0021__must must 0042_0026__until->0042_0021__must [scope] 0042_0034__and and 0042_0026__until->0042_0034__and [restriction] 0042_0005__red red 0042_0006__lights->0042_0005__red [attrib] 0042_0008__located located 0042_0008__located->0042_0006__lights [prn] 0042_0010__the_0042_0012__front_0042_0013__and_0042_0014__back the_front_and_back 0042_0008__located->0042_0010__the_0042_0012__front_0042_0013__and_0042_0014__back at[clr][loc] 0042_0011__top top 0042_0010__the_0042_0012__front_0042_0013__and_0042_0014__back->0042_0011__top [attrib] 0042_0016__the_0042_0017__bus the_bus 0042_0010__the_0042_0012__front_0042_0013__and_0042_0014__back->0042_0016__the_0042_0017__bus of 0042_0024__eithe either[quant] 0042_0021__must->0042_0024__eithe [scope] 0042_0022__stop stop 0042_0024__eithe->0042_0022__stop [scope] 0042_0025__direction direction 0042_0024__eithe->0042_0025__direction [restriction] 0042_0020__you you 0042_0022__stop->0042_0020__you [arg0] 0042_0022__stop->0042_0025__direction from[dir] 0042_0029__are are 0042_0034__and->0042_0029__are [conj1] 0042_0037__stop stop 0042_0034__and->0042_0037__stop [conj2] 0042_0027__the_0042_0028__children the_children 0042_0029__are->0042_0027__the_0042_0028__children [arg0] 0042_0030__safely safely 0042_0029__are->0042_0030__safely [mnr] 0042_0032__the_0042_0033__street the_street 0042_0029__are->0042_0032__the_0042_0033__street across[clr][prd2] 0042_0037__stop->0042_0006__lights [arg0] 0042_0038__flashing flashing 0042_0037__stop->0042_0038__flashing [arg1] 0042_0038__flashing->0042_0006__lights [arg0]
arc(r_0042_0001__When_tmp,r_0042_0004__flashes,restriction).
arc(r_0042_0001__When_tmp,r_0042_0026__until_tmp,scope).
arc(r_0042_0004__flashes,r_0042_0002__the_r_0042_0003__bus,arg0).
arc(r_0042_0004__flashes,r_0042_0006__lights,arg1).
arc(r_0042_0006__lights,r_0042_0005__red,attrib).
arc(r_0042_0008__located,r_0042_0006__lights,prn).
arc(r_0042_0008__located,r_0042_0010__the_r_0042_0012__front_r_0042_0013__and_r_0042_0014__back,r_0042_0009__at__clr_loc).
arc(r_0042_0010__the_r_0042_0012__front_r_0042_0013__and_r_0042_0014__back,r_0042_0011__top,attrib).
arc(r_0042_0010__the_r_0042_0012__front_r_0042_0013__and_r_0042_0014__back,r_0042_0016__the_r_0042_0017__bus,r_0042_0015__of).
arc(r_0042_0021__must,r_0042_0024__either__quant,keep_scope).
arc(r_0042_0022__stop,r_0042_0020__you,arg0).
arc(r_0042_0022__stop,r_0042_0025__direction,r_0042_0023__from__dir).
arc(r_0042_0024__either__quant,r_0042_0022__stop,scope).
arc(r_0042_0024__either__quant,r_0042_0025__direction,restriction).
arc(r_0042_0026__until_tmp,r_0042_0021__must,scope_).
arc(r_0042_0026__until_tmp,r_0042_0034__and,restriction_).
arc(r_0042_0029__are,r_0042_0027__the_r_0042_0028__children,arg0).
arc(r_0042_0029__are,r_0042_0030__safely,mnr).
arc(r_0042_0029__are,r_0042_0032__the_r_0042_0033__street,r_0042_0031__across__clr_prd2).
arc(r_0042_0034__and,r_0042_0029__are,coord_conj1).
arc(r_0042_0034__and,r_0042_0037__stop,coord_conj2).
arc(r_0042_0037__stop,r_0042_0006__lights,arg0).
arc(r_0042_0037__stop,r_0042_0038__flashing,arg1).
arc(r_0042_0038__flashing,r_0042_0006__lights,arg0).


IP-MAT PP-SCON-TMP P-CONN When IP-ADV NP-SBJ D the N bus VBP;~Tn flashes NP-OB1 ADJP ADJ red NS lights PULB -LRB- PRN IP-PPL VVN;~Ipr located PP-CLR-LOC P-ROLE at NP D the ADJP ADJ top NLYR NP N front CONJP CONJ and NP N back PP P-ROLE of NP D the N bus PURB -RRB- PUNC , NP-SBJ PRO you MD;~cat_Vi must IP-INF-CAT VB;~I stop PP-DIR P-ROLE from NP Q either N direction PP-SCON-TMP P-CONN until IP-ADV ILYR ILYR NP-SBJ D the NS children BEP;~Ipr are ADVP-MNR ADV safely PP-CLR-PRD2 P-ROLE across NP D the N street CONJP CONJ and ILYR NP-SBJ D the NS lights VB;~Tg stop IP-PPL-OB1 VAG;~I flashing PUNC .
( (IP-MAT (PP-SCON-TMP (P-CONN When;{when})
                       (IP-ADV (NP-SBJ;{SCHOOL_BUS} (D the;{the})
                                                    (N bus;{bus}))
                               (VBP;~Tn flashes;{flash})
                               (NP-OB1;{RED_LIGHTS} (ADJP (ADJ red;{red}))
                                                    (NS lights;{light})
                                                    (PULB -LRB-)
                                                    (PRN (IP-PPL (VVN;~Ipr located;{locate[at]})
                                                                 (PP-CLR-LOC (P-ROLE at;{at})
                                                                             (NP (D the;{the})
                                                                                 (ADJP (ADJ top;{top}))
                                                                                 (NLYR (NP (N front;{front}))
                                                                                       (CONJP (CONJ and;{and})
                                                                                              (NP (N back;{back}))))
                                                                                 (PP (P-ROLE of;{of})
                                                                                     (NP (D the;{the})
                                                                                         (N bus;{bus})))))))
                                                    (PURB -RRB-))))
          (PUNC ,)
          (NP-SBJ (PRO you;{you}))
          (MD;~cat_Vi must;{must})
          (IP-INF-CAT (VB;~I stop;{stop})
                      (PP-DIR (P-ROLE from;{from})
                              (NP (Q either;{either})
                                  (N direction;{direction}))))
          (PP-SCON-TMP (P-CONN until;{until})
                       (IP-ADV (ILYR (ILYR (NP-SBJ (D the;{the})
                                                   (NS children;{child}))
                                           (BEP;~Ipr are;{be[across]})
                                           (ADVP-MNR (ADV safely;{safely}))
                                           (PP-CLR-PRD2 (P-ROLE across;{across})
                                                        (NP (D the;{the})
                                                            (N street;{street}))))
                                     (CONJP (CONJ and;{and})
                                            (ILYR (NP-SBJ;{RED_LIGHTS} (D the;{the})
                                                                       (NS lights;{light}))
                                                  (VB;~Tg stop;{stop})
                                                  (IP-PPL-OB1 (VAG;~I flashing;{flash})))))))
          (PUNC .))
  (ID 42_a_driver_handbook))