ひがしアメリカ せん歯鯨 はくじらであれば
higashiamerikasenwa kujiradeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 東アメリカ扇歯鯨

1. If it were the eastern North American fan-toothed whale:; If the eastern North American fan-toothed whale existed:

Ba Conditional