'It moves slowly for a long time, but when it does decide to change, it moves incredibly quickly.
(It; moves slowly; T:for a long time) (it; moves incredibly quickly; T:when it does decide to change) (it; does decide; to change) Context(it does decide,List([43, 57))):(it; does decide to change to change; )
it does decide,List([43, 57))
It it it it
moves slowly moves incredibly quickly does decide does decide to change to change
T:for a long time
T:when it does decide to change
to change