Complex sentence: Prof Halle was married for fifty six years to noted artist Rosamond Thaxter Strong Halle until her death in April of 2011 producing three sons, David, John and Timothy.
Split into simpler sentences: Prof Halle was married for fifty six years to noted artist Rosamond Thaxter Strong Halle until her death in April of 2011. He has three sons, David, John and Timothy.