You need to use pesticides to kill insects that might harm your crops.
(insects; might harm; your crops) (You; need; to use pesticides to kill insects) Context(You need,List([0, 8))):(You; need to use; pesticides; to kill insects) Context(You need to use,List([0, 15))):(You; need to use pesticides to kill; insects that might harm your crops)
You need,List([0, 8)) You need to use,List([0, 15))
insects You You You
might harm need need to use need to use pesticides to kill
your crops
to use pesticides to kill insects
pesticides to kill insects
insects that might harm your crops