( ( ( Offers information ) ( on ( ( ( Fermi 's ) contribution ) ( to ( the first ) ) ) ) ) ( ( controlled ( nuclear ( chain reaction ) ) ) . ) )
(ROOT (S (NP (NP (JJ Offers) (NN information)) (PP (IN on) (NP (NP (NP (NNP Fermi) (POS 's)) (NN contribution)) (PP (TO to) (NP (DT the) (JJ first)))))) (VP (VBD controlled) (NP (JJ nuclear) (NN chain) (NN reaction))) (. .)))
Offers information on Fermi's contribution to the first controlled nuclear chain reaction.
(ROOT (S (NP (NNP Control) (NNS rods)) (VP (VBP play) (NP (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (NP (DT the) (NN modulation)) (PP (IN of) (NP (DT the) (JJ nuclear) (NN chain) (NN reaction))))))) (. .)))