As the tide rises and falls it flexes the ice, breaking the join between ice and rock.
(the tide; rises; ) (the tide; falls; ) (it; flexes; the ice; breaking the join between ice and rock; T:As the tide rises and falls) Context(it flexes,List([28, 37))):(it; flexes the ice breaking; the join between ice and rock)
it flexes,List([28, 37))
the tide the tide it it
rises falls flexes flexes the ice breaking
the ice breaking the join between ice and rock T:As the tide rises and falls
the join between ice and rock