( ( Human activity ) ( ( ( ( ( threatens ( ( about 1,200 ) ( bird species ) ) ) ( with extinction ) ) , ) ( though ( efforts ( are ( underway ( to ( protect them ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Human) (NN activity)) (VP (VBZ threatens) (NP (QP (RB about) (CD 1,200)) (NN bird) (NNS species)) (PP (IN with) (NP (NN extinction))) (, ,) (SBAR (IN though) (S (NP (NNS efforts)) (VP (VBP are) (ADJP (JJ underway) (S (VP (TO to) (VP (VB protect) (NP (PRP them)))))))))) (. .)))
Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them.
(ROOT (S (PP (IN Around) (NP (CD 1200))) (NP (NP (NNS species)) (PP (IN of) (NP (NNS birds)))) (VP (VBP are) (ADVP (ADVP (RB currently)) (PP (IN at) (NP (NP (NN risk)) (PP (IN of) (NP (NN extinction)))))) (ADJP (JJ due) (PP (TO to) (NP (JJ human) (NN activity))))) (. .)))