Complex sentence: Their 1978 cover of "I Can't Stand the Rain" was a big hit, reaching number five in UK singles chart, and number 18 in U.S. One year later they released their well known hit, "One Way Ticket".
Split into simpler sentences: Their 1978 cover of "I Can't Stand the Rain" was a big hit, reaching number five in UK and number 18 in USA. Year later they released their most well-known hit, "One Way Ticket".