( Massive ( Vegetation ( Loss ( Accompanied ( Mass ( Extinction . ) ) ) ) ) )
(ROOT (NP (NNP Massive) (NNP Vegetation) (NNP Loss) (NNP Accompanied) (NNP Mass) (NNP Extinction) (. .)))
Massive Vegetation Loss Accompanied Mass Extinction .
(ROOT (S (NP (NP (ADJP (JJ Sudden) (CC and) (JJ dramatic)) (NNS losses)) (PP (IN of) (NP (NN biodiversity)))) (VP (VBP are) (VP (VBN called) (NP (JJ mass) (NN extinction)))) (. .)))