50_a_lob_j01
The first requirement is for an anionic electrolyte, which can be fabricated into suitable shapes impervious to gases and liquid sodium and which is neither corroded by sodium nor by sodium monoxide.

0050_0004__is_0050_0005__for is_for 0050_0001__The_0050_0002__first_0050_0003__requirement the_first_requirement 0050_0004__is_0050_0005__for->0050_0001__The_0050_0002__first_0050_0003__requirement [arg0] 0050_0006__an_0050_0008__electrolyte an_electrolyte 0050_0004__is_0050_0005__for->0050_0006__an_0050_0008__electrolyte [arg1] 0050_0007__anionic anionic 0050_0006__an_0050_0008__electrolyte->0050_0007__anionic [attrib] 0050_0011__can can 0050_0012__be be 0050_0011__can->0050_0012__be [scope] 0050_0013__fabricated fabricated 0050_0012__be->0050_0013__fabricated [scope] 0050_0013__fabricated->0050_0006__an_0050_0008__electrolyte [arg1] 0050_0016__shapes shapes 0050_0013__fabricated->0050_0016__shapes into[nim] staz_0050_5013 * 0050_0013__fabricated->staz_0050_5013 [arg0] 0050_0015__suitable suitable 0050_0016__shapes->0050_0015__suitable [attrib] 0050_0017__impervious impervious 0050_0016__shapes->0050_0017__impervious [attrib] 0050_0020__and and 0050_0017__impervious->0050_0020__and to 0050_0019__gases gases 0050_0020__and->0050_0019__gases [conj1] 0050_0022__sodium sodium 0050_0020__and->0050_0022__sodium [conj2] 0050_0021__liquid liquid 0050_0022__sodium->0050_0021__liquid [attrib] 0050_0023__and and 0050_0023__and->0050_0011__can [conj1] 0050_0025__is is 0050_0023__and->0050_0025__is [conj2] 0050_0026__neithe0050_0030__nor neither_nor 0050_0025__is->0050_0026__neithe0050_0030__nor [scope] 0050_0027__corroded corroded 0050_0026__neithe0050_0030__nor->0050_0027__corroded [conj1] z_0050_5021 _ 0050_0026__neithe0050_0030__nor->z_0050_5021 [conj2] 0050_0027__corroded->0050_0006__an_0050_0008__electrolyte [arg1] 0050_0029__sodium sodium 0050_0027__corroded->0050_0029__sodium by[arg0] z_0050_5021->0050_0006__an_0050_0008__electrolyte [arg1] 0050_0032__sodium_0050_0033__monoxide sodium_monoxide z_0050_5021->0050_0032__sodium_0050_0033__monoxide by[arg0]
arc(r_0050_0004__is_r_0050_0005__for,r_0050_0001__The_r_0050_0002__first_r_0050_0003__requirement,arg0).
arc(r_0050_0004__is_r_0050_0005__for,r_0050_0006__an_r_0050_0008__electrolyte,arg1).
arc(r_0050_0006__an_r_0050_0008__electrolyte,r_0050_0007__anionic,attrib).
arc(r_0050_0011__can,r_0050_0012__be,keep_scope).
arc(r_0050_0012__be,r_0050_0013__fabricated,keep_scope).
arc(r_0050_0013__fabricated,r_0050_0006__an_r_0050_0008__electrolyte,arg1).
arc(r_0050_0013__fabricated,r_0050_0016__shapes,r_0050_0014__into__nim).
arc(r_0050_0013__fabricated,star_z_0050_5013,arg0).
arc(r_0050_0016__shapes,r_0050_0015__suitable,attrib).
arc(r_0050_0016__shapes,r_0050_0017__impervious,attrib).
arc(r_0050_0017__impervious,r_0050_0020__and,r_0050_0018__to).
arc(r_0050_0020__and,r_0050_0019__gases,conj1).
arc(r_0050_0020__and,r_0050_0022__sodium,conj2).
arc(r_0050_0022__sodium,r_0050_0021__liquid,attrib).
arc(r_0050_0023__and,r_0050_0011__can,coord_conj1).
arc(r_0050_0023__and,r_0050_0025__is,coord_conj2).
arc(r_0050_0025__is,r_0050_0026__neither_r_0050_0030__nor,keep_scope).
arc(r_0050_0026__neither_r_0050_0030__nor,r_0050_0027__corroded,conj1).
arc(r_0050_0026__neither_r_0050_0030__nor,z_0050_5021,conj2).
arc(r_0050_0027__corroded,r_0050_0006__an_r_0050_0008__electrolyte,arg1).
arc(r_0050_0027__corroded,r_0050_0029__sodium,r_0050_0028__by_arg0).
arc(z_0050_5021,r_0050_0006__an_r_0050_0008__electrolyte,arg1).
arc(z_0050_5021,r_0050_0032__sodium_r_0050_0033__monoxide,r_0050_0031__by_arg0).


IP-MAT NP-SBJ D The NUM first N requirement BEP;~Ipr is PP-CLR P-ROLE for NP D an ADJP ADJ anionic N electrolyte PUNC , IP-REL ILYR ILYR NP-SBJ RPRO which MD;~cat_Vi can IP-INF-CAT BE;~cat_Ve_passive_ be IP-PPL-CAT NP-LGS * VVN fabricated PP-NIM P-ROLE into NP ADJP ADJ suitable NS shapes ADJP ADJ impervious PP P-ROLE to NP NLYR NLYR NS gases CONJP CONJ and NLYR ADJP ADJ liquid N sodium CONJP CONJ and ILYR NP-SBJ RPRO which BEP;~cat_Ve_passive_ is IP-PPL-CAT ILYR CONJ neither ILYR VVN corroded PP-LGS P-ROLE;_lgs_ by NP N sodium CONJP CONJ nor ILYR PP-LGS P-ROLE;_lgs_ by NP N sodium N monoxide PUNC .
( (IP-MAT (NP-SBJ (D The;{the})
                  (NUM first;{first})
                  (N requirement;{requirement}))
          (BEP;~Ipr is;{be[for]})
          (PP-CLR (P-ROLE for;{for})
                  (NP (D an;{an})
                      (ADJP (ADJ anionic;{anionic}))
                      (N electrolyte;{electrolyte})
                      (PUNC ,)
                      (IP-REL (ILYR (ILYR (NP-SBJ (RPRO which;{which}))
                                          (MD;~cat_Vi can;{can})
                                          (IP-INF-CAT (BE;~cat_Ve_passive_ be;{be})
                                                      (IP-PPL-CAT (NP-LGS *)
                                                                  (VVN fabricated;{fabricate})
                                                                  (PP-NIM (P-ROLE into;{into})
                                                                          (NP (ADJP (ADJ suitable;{suitable}))
                                                                              (NS shapes;{shape})
                                                                              (ADJP (ADJ impervious;{impervious})
                                                                                    (PP (P-ROLE to;{to})
                                                                                        (NP (NLYR (NLYR (NS gases;{gas}))
                                                                                                  (CONJP (CONJ and;{and})
                                                                                                         (NLYR (ADJP (ADJ liquid;{liquid}))
                                                                                                               (N sodium;{sodium}))))))))))))
                                    (CONJP (CONJ and;{and})
                                           (ILYR (NP-SBJ (RPRO which;{which}))
                                                 (BEP;~cat_Ve_passive_ is;{be})
                                                 (IP-PPL-CAT (ILYR (CONJ neither;{neither})
                                                                   (ILYR (VVN corroded;{corrode})
                                                                         (PP-LGS (P-ROLE;_lgs_ by;{by})
                                                                                 (NP (N sodium;{sodium}))))
                                                                   (CONJP (CONJ nor;{nor})
                                                                          (ILYR (PP-LGS (P-ROLE;_lgs_ by;{by})
                                                                                        (NP (N sodium;{sodium})
                                                                                            (N monoxide;{monoxide})))))))))))))
          (PUNC .))
  (ID 50_a_lob_j01))