教師 きょうしなし学習 がくしゅうではありませんでした
kyōshi nashiga kushūdewārimasendeshita

Noun
Desu Copula

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

1. Was not teacherless learning.; Was not learning without a teacher.

Past/Perfective
Negative
Polite
Formal Register
Computing