You can see the effects of the field when you use a compass to find out which direction is north.
(You; can see; the effects of the field; T:when you use a compass to find out which direction is north) (you; use; a compass; to find out which direction is north) Context(you use,List([42, 49))):(you; use a compass to find out; which direction is north) Context(you use to find out,List([42, 71))):(which direction; is; north)
you use,List([42, 49)) you use to find out,List([42, 71))
You you you which direction
can see use use a compass to find out is
the effects of the field T:when you use a compass to find out which direction is north
a compass to find out which direction is north
which direction is north
north