Complex sentence: By the end of the century Aylesbury had a population of 10,000, all of whom had to be housed, many in the solid 19th century houses which grew up on the roads approaching the town-Tring Road, Bierton Road and Wendover Road.
Split into simpler sentences: By the end of the century Aylesbury had a population of 10000. All of whom had to be housed, many in the solid 19th century houses which grew up on the roads approaching the town-Tring Road, Bierton Road and Wendover Road.