不法 ふほう無線 むせん きょくではありませんでした
fuhōmusenkyokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 不法無線局

1. It was not an illegal radio station.; It was not an unlawful radio station.

Past/Perfective
Negative
Polite
Formal Register