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Sentence analysis
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Sentence
Span Details
この
this; last (couple of years, etc.); these; past; you (as in "you liar")-> 此のpre-noun adjective
研究
research; study; investigationnoun, suru verb
の
possession, attribution, nominalizer, or nominal linkergrammar
主な
main; chief; principal; importantpre-noun adjective
問題領域
problem area; area of concernnoun
は
topic markergrammar
データ
data; datumnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
信頼性
reliability; credibility; trustworthinessnoun
です。
be; is; arecopula, auxiliary
出洲ですspit of land; sandspit