Complex sentence: Peter Alexander (born 27 February 1939) is an American artist who is a pioneering member of the Light and Space artistic movement in southern California in the 1960s, he is best known for his resin sculptures from the 1960s and 1970s.
Split into simpler sentences: Peter Alexander (born 27 February 1939) is an American artist. A member of the Light and Space artistic movement in southern California in the 1960s, he is best known for his resin sculptures from the 1960s and 1970s.