( ( ( Supernova Nucleosynthesis ) ( of ( ( 60 ( Fe ( Description ( The synthesis ) ) ) ) ( of ( ( heavy elements ) ( of ( the ( iron group ) ) ) ) ) ) ) ) ( ( is ( believed ( to ( be ( associated ( with ( supernova events ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Supernova) (NNP Nucleosynthesis)) (PP (IN of) (NP (NP (CD 60) (NNP Fe) (NNP Description) (NNP The) (NN synthesis)) (PP (IN of) (NP (NP (JJ heavy) (NNS elements)) (PP (IN of) (NP (DT the) (NN iron) (NN group)))))))) (VP (VBZ is) (VP (VBN believed) (S (VP (TO to) (VP (VB be) (VP (VBN associated) (PP (IN with) (NP (NN supernova) (NNS events))))))))) (. .)))
Supernova Nucleosynthesis of 60 Fe Description The synthesis of heavy elements of the iron group is believed to be associated with supernova events.
(ROOT (S (NP (NNS Supernovas)) (VP (VBP are) (ADJP (ADJP (NP (NP (DT the) (NN source)) (PP (IN of) (NP (NNS elements)))) (JJR heavier)) (PP (IN than) (NP (NN iron))))) (. .)))