In the years before there were community water supply systems, most people relied on wells to provide their drinking water.
(most people; relied; on wells; to provide their drinking water; T:In the years) Context(most people relied,List([63, 81))):(most people; relied on wells to provide; their drinking water)
most people relied,List([63, 81))
most people most people
relied relied on wells to provide
on wells to provide their drinking water T:In the years
their drinking water