AnalyzerSentence analysis8SpansSentence背中を反らすストレッチが腰痛に効く。1000 character limitAnalyzeSentence背せ中なかを反そらすストレッチが腰よう痛つうに効きく。Span Details背せ中なかback (of the body)nounをobject markergrammarReport an issue with this page