( ( Carbon dating ) ( ( ( uses ( ( Carbon-14 , ) ( ( a ( radioactive isotope ) ) ( of carbon ) ) ) ) ( with ( ( a ( half life ) ) ( of ( 5730 years ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Carbon) (NNP dating)) (VP (VBZ uses) (NP (NP (NNS Carbon-14)) (, ,) (NP (NP (DT a) (JJ radioactive) (NN isotope)) (PP (IN of) (NP (NN carbon))))) (PP (IN with) (NP (NP (DT a) (JJ half) (NN life)) (PP (IN of) (NP (CD 5730) (NNS years)))))) (. .)))
Carbon dating uses Carbon-14, a radioactive isotope of carbon with a half life of 5730 years.
(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))))) (. .)))