おすしだでわありませんでした
雄羊歯ではありませんでした
osushidadewārimasendeshita

Noun
Desu Copula

The polite, past negative form of おしだ

1. Was not a male sheep tooth.; Was not a ram's tooth.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana