Complex sentence: In late December 1981 he played a few concerts with Black Flag because their drummer ROBO was detained in England after a tour there, he went on to record with Black Flag on several of their albums until 1985.
Split into simpler sentences: In late December 1981 he played a few concerts with Black Flag because their drummer ROBO was detained in England after a tour there. He went on to record with Black Flag on several of their albums until 1985.