Complex sentence: Bennett's father, John Bennett, was the partner of Robert Martell in a music hall slapstick comedy act but Glasgow-born Billy chose not to follow him immediately onto the stage, instead enlisting in the army.
Split into simpler sentences: Bennett's father, John Bennett, was the partner of Robert Martell who both appeared in a music hall slapstick comedy act. Billy Bennett was initially reluctant to follow his father onto the stage, instead enlisting in the army.