( ( ( ( ( The research ) , ) ( by ( ( ( scientists ( at ( ( the University ) ( of Adelaide ) ) ) ) and ) ( ( ( ( the ( Australian ( Nuclear ( Science ( and ( Technology Organisation ) ) ) ) ) ) ( -LRB- ( ANSTO -RRB- ) ) ) , ) ( at ( ( ( Lucas Heights ) , ) Sydney ) ) ) ) ) ) , ) ( ( centres ( on ( ( carbon-14 , ) ( ( the ( naturally-occurring ( radioactive isotope ) ) ) ( best ( known ( for ( ( its use ) ( in ( ( the dating ) ( of ( ancient ( organic material ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN research)) (, ,) (PP (IN by) (NP (NP (NP (NNS scientists)) (PP (IN at) (NP (NP (DT the) (NNP University)) (PP (IN of) (NP (NNP Adelaide)))))) (CC and) (NP (NP (DT the) (JJ Australian) (NNP Nuclear) (NNP Science) (CC and) (NNP Technology) (NNP Organisation)) (PRN (-LRB- -LRB-) (NP (NNP ANSTO)) (-RRB- -RRB-)) (, ,) (PP (IN at) (NP (NP (NNP Lucas) (NNP Heights)) (, ,) (NP (NNP Sydney))))))) (, ,)) (VP (VBZ centres) (PP (IN on) (NP (NP (JJ carbon-14)) (, ,) (NP (NP (DT the) (JJ naturally-occurring) (NN radioactive) (NN isotope)) (VP (RBS best) (VBN known) (PP (IN for) (NP (NP (PRP$ its) (NN use)) (PP (IN in) (NP (NP (DT the) (NN dating)) (PP (IN of) (NP (JJ ancient) (JJ organic) (NN material)))))))))))) (. .)))
The research, by scientists at the University of Adelaide and the Australian Nuclear Science and Technology Organisation (ANSTO), at Lucas Heights, Sydney, centres on carbon-14, the naturally-occurring radioactive isotope best known for its use in the dating of ancient organic material.
(ROOT (S (NP (NP (NNP Carbon) (CD 14) (NN isotope)) (PP (IN of) (NP (NN carbon)))) (VP (VBZ is) (ADVP (RB typically)) (VP (VBN used) (PP (TO to) (NP (NN date) (JJ ancient) (NNS items))))) (. .)))