Complex sentence: Scottish Friendly was established in 1862 as the City of Glasgow Friendly Society, having been started by John Stewart as a breakaway movement from the Royal Liver Friendly Society headquartered in Liverpool.
Split into simpler sentences: Scottish Friendly was established in 1862 as the City of Glasgow Friendly Society. The City of Glasgow Friendly Society started as a breakaway movement from the Royal Liver Friendly Society, whose headquarters were in Liverpool.