Complex sentence: The hiring of Frank McGuire in 1964 propelled South Carolina to its most successful period to date, which was highlighted by an undefeated conference record in 1970, an ACC Tournament championship in 1971, and three consecutive Sweet 16 appearances (1971-73).
Split into simpler sentences: The hiring of Frank McGuire in 1964 propelled South Carolina to its most successful period to date. Coach McGuire's run was highlighted by an undefeated conference record in 1970, an ACC Tournament championship in 1971, and three consecutive Sweet 16 appearances (1971-73).