( There ( ( have ( been ( ( five ( major ( mass extinctions ) ) ) ( in ( ( Earth 's ) history ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP have) (VP (VBN been) (NP (NP (CD five) (JJ major) (NN mass) (NNS extinctions)) (PP (IN in) (NP (NP (NNP Earth) (POS 's)) (NN history)))))) (. .)))
There have been five major mass extinctions in Earth's 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)))))))) (. .)))