Complex sentence: Lipman worked extensively in the theatre following her debut in a stage production of "The Knack" at the Palace Theatre, Watford and was a member of Laurence Olivier's Royal National Theatre Company at the Old Vic.
Split into simpler sentences: Lipman worked extensively in the theatre following her début in a stage production of "The Knack" at the Palace Theatre, Watford. She was a member of Laurence Olivier's Royal National Theatre Company at the Old Vic.