Complex sentence: He opted instead to spend over thirty five years as a taxi driver in Ottawa, where he was ultimately sufficiently successful to be able to purchase his own "plate", or taxi license, rather than renting plate rights from others.
Split into simpler sentences: He opted instead to spend over thirty five years as a taxi driver in Ottawa. Where he was ultimately sufficiently successful to be able to purchase his own "plate", or taxi license, rather than renting plate rights from others.