Complex sentence: From Milton, Ontario where attended school, Sproule was a competitive cyclist and played amateur hockey in his hometown before moving to Toronto where he played for Toronto Old Orchard and the Toronto Rowing Club hockey teams.
Split into simpler sentences: From Milton, Ontario where attended school, Sproule was a competitive cyclist and played amateur hockey in his hometown. While in Toronto, Sproule played for the Toronto Old Orchard and the Toronto Rowing Club hockey teams.