Complex sentence: He worked at a Holy Cross College as a labourer, and in 1909 was given his anglicised name by the college's Catholic priest; thereonafter, the moved to the province of Alberta.
Split into simpler sentences: He worked at a Holy Cross College as a labourer, and in 1909, was given his anglicised name by the college's Catholic priest. Thereonafter, the moved to the province of Alberta.