Complex sentence: He studied medicine under John Darby, and began practice at Bedford, New York, in 1756, and in 1760 moved to New Haven, where he resided for more than 50 years.
Split into simpler sentences: He studied medicine under John Darby, and began practice at Bedford, New York, in 1756. In 1760 he moved to New Haven where he resided for more than 50 years.