Complex sentence: Fleming and Morgan came up with the song "Smoky Mountain Rain" which became a huge hit for Ronnie MIlsap, and went to number one on both the country charts and Billboard's Adult Contemporary charts.
Split into simpler sentences: Fleming and Morgan came up with the song "Smoky Mountain Rain" which became a huge hit for MIlsap. The song went to number one on both the country charts and Billboard's Adult Contemporary charts.