無主 むしゅ ぶつ先占 せんせんじゃありませんでした
mushubutsu sensenjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 無主物先占

1. It wasn't an unclaimed item.; It wasn't something left by its owner.

Past/Perfective
Negative
Polite
Terminal Form
Law