Complex sentence: Jean-François "J.F." Jenny-Clark (12 July 1944 in Toulouse, France--6 October 1998 in Paris) was a French double bass player was estimated as one of the most important bass players of European jazz.
Split into simpler sentences: Jean-François "J.F." Jenny-Clark (12 July 1944 in Toulouse, France--6 October 1998 in Paris) was a French double bass player. He was estimated as one of the most important bass players of European jazz.