( ( The competition ) ( ( used ( ( a form ) ( of ( double-elimination tournament ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN competition)) (VP (VBD used) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (JJ double-elimination) (NN tournament))))) (. .)))
The competition used a form of double-elimination tournament.
(ROOT (S (NP (NP (QP (DT Half))) (PP (IN of) (NP (NP (DT the) (NNS neurons)) (VP (VBN formed) (PP (IN in) (NP (DT the) (NN embryo))))))) (VP (VBP are) (VP (VBN eliminated) (PP (RB because) (IN of) (NP (NN competition)))))))