教師 きょうしなし学習 がくしゅうじゃなかったです
kyōshi nashiga kushūjanakattadesu

Noun
Desu Copula

The polite, past negative form of 教師なし学習

1. Wasn't self-taught.; Wasn't learning without a teacher.

Past/Perfective
Negative
Polite
Casual Register
Computing