無主 むしゅ ぶつ先占 せんせんではありませんでした
mushubutsu sensendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 無主物先占

1. It was not an unclaimed item.; It was not an ownerless thing.

Past/Perfective
Negative
Polite
Formal Register
Law