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Sentence
Span Details
ベルコア
Bellcorenoun
は
topic markergrammar
かつて
once; before; formerly; ever; never yet; never before; first time-> 嘗てadverb, no-adjective
ベル研究所
Bell Laboratories; Bell Labsnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
一部
one part; one portion; one section; one copy; one complete setnoun, adverb
門
gate; doorway; school (of thought); branch of learning; phylum; division (biology); counter for cannonsnoun, noun suffix, counter
だった。
past copulagrammar