The pressure and the heat squash the rocks together and that is how the metamorphic rock is formed.
(The pressure and the heat; squash together; the rocks) (that; is; how the metamorphic rock is formed) Context(that is,List([56, 63))):(the metamorphic rock; is formed; )
that is,List([56, 63))
The pressure and the heat that the metamorphic rock
squash together is is formed
the rocks
how the metamorphic rock is formed