先祖 せんぞ構造 こうぞう たいじゃなかったです
senzokōzōtaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 先祖構造体

1. Wasn't an ancestral structure.; Wasn't a prototype.

Past/Perfective
Negative
Polite
Casual Register
Computing