Complex sentence: Louis Charles Auguste Claude Trenet, known as Charles Trenet (18 May 1913--19 February 2001), was a French singer and songwriter, most famous for his recordings from the late 1930s until the mid- 1950s, though his career continued through the 1990s.
Split into simpler sentences: Louis Charles Auguste Claude Trenet, known as Charles Trenet (18 May 1913--19 February 2001), was a French singer and songwriter. He was most famous for his recordings from the late 1930s until the mid- 1950s, though his career continued through the 1990s.