Complex sentence: From 1964 to 1972, the College Division had four postseason bowl games, to determine regional champions for the East, Mideast, Midwest, and West--these bowl games were played after the AP and UPI polls had been completed.
Split into simpler sentences: From 1964 to 1972, the College Division had four postseason bowl games, to determine regional champions for the East, Mideast, Midwest, and West. These bowl games were usually played after the AP and UPI polls had been completed.