Complex sentence: The Chicago Bulls had easily swept the Knicks in 1991 enroute to their first championship, however in 1992 with Riley behind the bench the Knicks pushed the defending championship Bulls to seven games in the Eastern Conference semifinals.
Split into simpler sentences: The Chicago Bulls had easily swept the Knicks in 1991 en route to their first championship. However, in 1992 with Riley, the Knicks pushed the defending championship Bulls to seven games in the Eastern Conference semifinals.