勅撰 ちょくせん和歌 わか しゅうであれば
chokusenwakashūdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 勅撰和歌集

1. If it is a collection of imperial anthology of waka poems; If it were a collection of imperial anthology of waka poems

Ba Conditional