( They ( ( tend ( to ( live ( near ( fast-moving ( ( streams and ) rivers ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP tend) (S (VP (TO to) (VP (VB live) (PP (IN near) (NP (JJ fast-moving) (NNS streams) (CC and) (NNS rivers))))))) (. .)))
They tend to live near fast-moving streams and rivers.
(ROOT (S (NP (NNP Jet) (NNP streams)) (VP (VBP are) (ADVP (RB fast)) (VP (VBG moving) (NP (NP (NNS rivers)) (PP (IN of) (NP (NN air))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBG going) (PP (IN in) (NP (NP (JJ opposite) (NNS directions)) (VP (VBN called))))))))))) (. .)))
Jet streams are fast moving rivers of air that are going in opposite directions called.