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Sentence
Span Details
昔
old days; the past; a long time ago; the past ten years; the past decadenoun, no-adjective, adverb
の
possession, attribution, nominalizer, or nominal linkergrammar
船乗り
sailor; seaman; marinernoun
は
topic markergrammar
天文航法
celestial navigationnoun
で
location, means, or scope markergrammar
海を渡った。
cross the ocean; go overseas; come from overseas-> 海を渡るexpression, verb