Analyzer
Sentence analysis
7Spans
Sentence
Span Details
マイレージ
mileage; frequent-flyer programnoun
を
object markergrammar
無料
free of charge; gratuitousno-adjective, noun
航空券
airline ticket; plane ticketnoun
に
direction, time, indirect object, or target markergrammar
交換
exchange; swap; replacementnoun, suru verb
した。
light/support verb with a noun or noun-like phrase-> するgrammar