sentence1_binary_parse: ( ( at ( ( the dawn ) ( of ( human history ) ) ) ) ( , ( ( clumsy man-apes ) ( ( ( capered ( around ( ( the savannah ) ( in ( the hunt ) ) ) ) ) ( for ( ( ( ( ( ( berries , ) nuts ) , ) ( woolly mammoth ) ) and ) ( so on ) ) ) ) . ) ) ) )
sentence1_parse: (ROOT (S (PP (IN at) (NP (NP (DT the) (NN dawn)) (PP (IN of) (NP (JJ human) (NN history))))) (, ,) (NP (JJ clumsy) (NNS man-apes)) (VP (VBD capered) (PP (IN around) (NP (NP (DT the) (NN savannah)) (PP (IN in) (NP (DT the) (NN hunt))))) (PP (IN for) (NP (NP (NNS berries)) (, ,) (NP (NNS nuts)) (, ,) (NP (JJ woolly) (NNS mammoth)) (CC and) (NP (RB so) (RB on))))) (. .)))
sentence1: at the dawn of human history, clumsy man-apes capered around the savannah in the hunt for berries, nuts, woolly mammoth and so on.
sentence2_parse: (ROOT (S (NP (JJ Woolly) (NNS mammoths)) (VP (VBD began) (S (VP (TO to) (VP (VB go) (NP (NP (ADJP (JJ extinct)) (NNS thousands)) (PP (IN of) (NP (NNS years)))) (ADVP (RB ago) (PP (IN because) (PP (IN of) (S (VP (VBG hunting) (PP (IN by) (NP (NNS humans)))))))))))) (. .)))
sentence2: Woolly mammoths began to go extinct thousands of years ago because of hunting by humans.