( ( Bull trout ) ( often ( ( live ( in ( cold ( mountain ( headwater streams ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Bull) (NNS trout)) (ADVP (RB often)) (VP (VBP live) (PP (IN in) (NP (JJ cold) (NN mountain) (NN headwater) (NNS streams)))) (. .)))
Bull trout often live in cold mountain headwater streams.
(ROOT (S (NP (NNS Streams)) (ADVP (RB often)) (VP (VBP start) (PP (IN in) (NP (NNS mountains)))) (. .)))