Complex sentence: Alexander Stirling Calder (January 11,1870, Philadelphia, Pennsylvania--January 7,1945) was an American sculptor, son of the sculptor Alexander Milne Calder, and father of the sculptor Alexander (Sandy) Calder.
Split into simpler sentences: Alexander Stirling Calder (January 11,1870--January 7,1945) was an American sculptor, born in Philadelphia, Pennsylvania. He was the son of sculptor Alexander Milne Calder, and the father of sculptor Alexander (Sandy) Calder.