Complex sentence: "Denis", a cover of the Randy & the Rainbows' 1963 hit "Denise", was a hit all over Europe; reaching number two in February 1978 in the United Kingdom.
Split into simpler sentences: Denis is a cover of the 1963 hit, "Denise", by Randy & the Rainbows. It was a hit all over Europe; reaching Number 2 in February 1978 in the United Kingdom.