sentence1_binary_parse: ( ( ( Two species ) ( sharing SINE ) ) ( ( must ( have ( a ( common ancestor ) ) ) ) . ) )
sentence1_parse: (ROOT (S (NP (NP (CD Two) (NNS species)) (VP (VBG sharing) (ADVP (RB SINE)))) (VP (MD must) (VP (VB have) (NP (DT a) (JJ common) (NN ancestor)))) (. .)))
sentence1: Two species sharing SINE must have a common ancestor.
sentence2_parse: (ROOT (S (NP (NP (DT The) (NN conclusion)) (SBAR (IN that) (S (NP (CD two) (NN animal) (NNS species)) (VP (VBD evolved) (PP (IN from) (NP (DT a) (JJ common) (NN ancestor))) (PP (IN in) (NP (JJ recent) (JJ geological) (NN history))))))) (VP (VBZ is) (ADVP (RBS best)) (VP (VBN supported) (PP (IN by) (NP (DT the) (NN observation))) (SBAR (IN that) (S (NP (DT the) (NNS species)) (VP (VBP have) (NP (JJ similar) (NN bone) (NN structure))))))) (. .)))
sentence2: The conclusion that two animal species evolved from a common ancestor in recent geological history is best supported by the observation that the species have similar bone structure.