Complex sentence: One of Canada's most influential alternative theatres, Theatre Passe Muraille (Theatre "without walls") was founded in 1968 by director and playwright Jim Garrard, who started the company out of Rochdale College.
Split into simpler sentences: One of Canada's most influential alternative theatres, Theatre Passe Muraille (Theatre "without walls") was founded in 1968 by director and playwright Jim Garrard. TPM's first artistic director was Jim Garrard who started the company out of Rochdale College.