The students learned the most by actually watching the volcano erupt.
(The students; learned; the most) Context(The students learned,List([0, 20))):(The students; learned the most by actually watching; the volcano erupt) Context(The students learned by actually watching,List([0, 50))):(the volcano; erupt; )
The students learned,List([0, 20)) The students learned by actually watching,List([0, 50))
The students The students the volcano
learned learned the most by actually watching erupt
the most
the volcano erupt