奴隷 どれい制度 せいど廃止 はいしじゃなかったです
doreiseidowa ishijanakattadesu

Noun
Desu Copula

The polite, past negative form of 奴隷制度廃止

1. Wasn't abolition of slavery.; Wasn't slavery's abolition.

Past/Perfective
Negative
Polite
Casual Register