Complex sentence: It peaked at number 11 on the Billboard Hot 100 chart in the United States and their third number-one hit on the easy listening chart, (following "If" and "Baby I'm-a Want You").
Split into simpler sentences: It peaked at number 11 on the Billboard Hot 100 chart in the United States. The song was a number-one hit on the easy listening chart, the third for the band on this chart (following "If" and "Baby I'm-a Want You").