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8Spans
Sentence
Span Details
オレフィン
olefin; alkenenoun
系
system; lineage; group; corollary; geological system; taxonomic seriesnoun, noun suffix
炭化水素
hydrocarbonnoun
は
topic markergrammar
石油化学
petrochemistrynoun
で
location, means, or scope markergrammar
重要
important; essential; significantna-adjective
です。
be; is; arecopula, auxiliary
出洲ですspit of land; sandspit