Analyzer
Sentence analysis
9Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
日本
Japannoun
の
possession, attribution, nominalizer, or nominal linkergrammar
史書
history book; historical recordnoun
を
object markergrammar
研究
research; study; investigationnoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
ている。
ongoing or resultant stategrammar