Complex sentence: The first indication of her drive & initiative came when, in the early 1870s, Catherine Gurney first began a Bible Class at Wandsworth, she then went on to form the International Christian Police Association in 1883 which resulted in a Police Institute being opened in London.
Split into simpler sentences: The first indication of her drive & initiative came when, in the early 1870s, Catherine Gurney first began a Bible Class at Wandsworth. She then went on to form the International Christian Police Association in 1883 which resulted in a Police Institute being opened in London.