Place the beaker on the hot plate, while the water is heating, stir with a glass rod, and bring the water slowly to a boil, and you should notice the water turning purple.
(the water; is heating; ) (you; should notice; the water turning purple) Context(you should notice,List([128, 145))):(the water; turning; purple)
you should notice,List([128, 145))
the water you the water
is heating should notice turning
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purple