Two separate glaciers formed Little Yosemite Valley and Tenaya Canyon, then they ran together and formed the valley.
(they; formed; the valley; T:then) (they; ran; together; T:then) Context(they ran,List([76, 84))):(Two separate glaciers; formed; Little Yosemite Valley and Tenaya Canyon)
they ran,List([76, 84))
they they Two separate glaciers
formed ran formed
the valley T:then
together T:then
Little Yosemite Valley and Tenaya Canyon