( Humans ( ( ( may potentially ) ( ( ( ( transmit ( Avian Influenza ) ) ( to ( animal ( and ( bird species ) ) ) ) ) , ) ( although ( ( the risk ) ( is ( moderate ( to low ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Humans)) (VP (MD may) (ADVP (RB potentially)) (VP (VB transmit) (NP (NNP Avian) (NNP Influenza)) (PP (TO to) (NP (NN animal) (CC and) (NN bird) (NNS species))) (, ,) (SBAR (IN although) (S (NP (DT the) (NN risk)) (VP (VBZ is) (ADJP (JJ moderate) (PP (TO to) (ADJP (JJ low))))))))) (. .)))
Humans may potentially transmit Avian Influenza to animal and bird species, although the risk is moderate to low.
(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))))) (. .)))