Complex sentence: "Stand by Your Man" also crossed over to the U.S. pop charts peaking at number nineteen, and elevated Wynette, then one of many somewhat successful female country recording artists, to superstar status.
Split into simpler sentences: Stand by Your Man also crossed over to the U.S. pop charts, peaking at number nineteen. It elevated Wynette--then one of many somewhat successful female country recording artists--to superstar status.