Complex sentence: Cris Williamson is an American feminist singer/songwriter, who achieved fame as a recording artist, and who was a pioneer as a lesbian political activist whose music and insight was a catalyst for change in the creation of women-owned record companies in the 1970s.
Split into simpler sentences: Cris Williamson is an American feminist singer-songwriter, who achieved fame as a recording artist, and who was a pioneer as a lesbian political activist. Williamson's music and insight has served as a catalyst for change in the creation of women-owned record companies in the 1970s.