Complex sentence: Neil Livingstone was a Sunday school teacher and teetotaller who handed out Christian tracts on his travels as a door to door tea salesman, and who extensively read books on theology, travel, and missionary enterprises.
Split into simpler sentences: Neil Livingstone was a Sunday school teacher and teetotaller who handed out Christian tracts on his travels as a door-to-door tea salesman. He extensively read books on theology, travel, and missionary enterprises.