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Sentence
Span Details
燐火
will-o'-the-wisp; phosphorescent lightnoun
は
topic markergrammar
科学的
scientificna-adjective
に
adverbial form after an adjectival suffixgrammar
は
topic markergrammar
自然発火
spontaneous combustionnoun
現象
phenomenonnoun
と
quotation, conditional, companion, or and markergrammar
される。
passive, potential, or respect auxiliarygrammar