Complex sentence: Fud Leclerc (born Fernand Urbain Dominic Leclercq), is a Belgian singer, who was also the pianist of Juliette Gréco.
Split into simpler sentences: Fud Leclerc (born Fernand Urbain Dominic Leclercq), Belgian singer. During his career he was also the pianist of Juliette Gréco.