Complex sentence: Though she did not speak French, she won the role, co-starring alongside Serge Gainsbourg, and she performed with him on the film's theme song, "La chanson de slogan"--the first of many collaborations between the two.
Split into simpler sentences: Though she did not speak French, she won the role. She co-starred with Serge Gainsbourg, and performed with him on the film's theme song, "La chanson de slogan"--the first of many collaborations between the two.