Complex sentence: He renamed it Chetwynd House and when he married his star designer Clarice Cliff in 1940, she moved into the house and lived there intil 1972, and it is her association that has made the house particularly famous since.
Split into simpler sentences: He renamed it Chetwynd House and when he married his star designer Clarice Cliff in 1940, she moved into the house and lived there intil 1972. It is her association that has made the house particularly famous since.