Complex sentence: He formed the punk band BlazeX in 1979 and played with them until the dissolved in 1981, the same year in which Carton married his high school sweetheart Trisha, with whom he had three sons.
Split into simpler sentences: He formed the punk band BlazeX in 1979 and played with them until they dissolved in 1981. In that year, Carton married his high school sweetheart Trisha, with whom he subsequently had three sons.