Complex sentence: He has twice won the Governor General's Award, for "Night Field" (1991) and "Another Gravity" (2000), and in June 2007 he won the Griffin Poetry Prize for "Strike/Slip" (2006).
Split into simpler sentences: He has twice won the Governor General's Award, for "Night Field" (1991) and "Another Gravity" (2000). In June 2007, he won the Griffin Poetry Prize for "Strike/Slip" (2006).