Complex sentence: The development of streetcar routes in the 19th century spurred the growth of single-family housing in town and a summer resort population on Lake Quinsigamond became consumers of the market garden produce grown by town farmers.
Split into simpler sentences: The development of streetcar routes in the 19th century spurred the growth of single-family housing in town. A summer resort population on Lake Quinsigamond became consumers of the market garden produce grown by town farmers.