Simplify the following text for a Grade 9 native English-speaking person.
Original: Carl-Henning Pedersen ( 23 September 1913 -- 20 February 2007 ) was a Danish painter and a key member of the COBRA movement which existed from 1948 to 1951 .
Simplified: Carl-Henning Pedersen ( 23 September 1913 -- 20 February 2007 ) was a Danish painter and a key member of the COBRA movement .