( ( ( ( ( At least ) seven ) species ) ( of ( water birds ) ) ) ( ( are ( known ( to ( breed ( on ( Montague Island ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (QP (IN At) (JJS least) (CD seven)) (NNS species)) (PP (IN of) (NP (NN water) (NNS birds)))) (VP (VBP are) (VP (VBN known) (S (VP (TO to) (VP (VB breed) (PP (IN on) (NP (NNP Montague) (NNP Island)))))))) (. .)))
At least seven species of water birds are known to breed on Montague Island.
(ROOT (S (NP (NNP Birds)) (VP (VBP live) (CC and) (VBP breed) (PP (IN on) (NP (NP (CD seven)) (PP (IN of) (NP (DT the) (NN continents)))))) (. .)))
Birds live and breed on seven of the continents.