Complex sentence: Oyston married his wife, Vicki, in 1964, and they have two sons, one of whom, Karl, was the chairman of Blackpool F.C. until 18 August 2010, when he resigned and also left the Board of Directors of the club.
Split into simpler sentences: Oyston married his wife, Vicki, in 1964, and they have two sons. One of whom, Karl, was the chairman of Blackpool F.C. until 18 August 2010, when he resigned and also left the Board of Directors of the club.