( ( Five ( major extinctions ) ) ( ( have ( ( taken place ) ( during ( Earth history ) ) ) ) . ) )
(ROOT (S (NP (CD Five) (JJ major) (NNS extinctions)) (VP (VBP have) (VP (VBN taken) (NP (NN place)) (PP (IN during) (NP (NNP Earth) (NN history))))) (. .)))
Five major extinctions have taken place during Earth history.
(ROOT (S (NP (EX There)) (VP (VBP have) (VP (VBN been) (NP (CD five) (JJ major) (JJ massive) (NNS extinctions)) (SBAR (IN since) (S (NP (NN life)) (VP (VBD began) (PP (IN on) (NP (NN earth)))))))) (. .)))