( ( ( ( ( Invasive and ) exotic ) species ) 3 ) . )
(ROOT (NP (NP (ADJP (JJ Invasive) (CC and) (JJ exotic)) (NNS species)) (ADJP (CD 3)) (. .)))
Invasive and exotic species 3.
(ROOT (S (NP (JJ Exotic) (NNS species)) (VP (VBP are) (ADVP (RB also)) (VP (VBN called) (NP (JJ invasive) (NNS species)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP threaten) (NP (JJ other) (NNS species))))))) (. .)))