特徴 とくちょう抽出 ちゅうしゅつではありませんでした
tokuchōchūshutsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 特徴抽出

1. Was not feature extraction.; It was not feature extraction.

Past/Perfective
Negative
Polite
Formal Register