(S (S (S (PP (PP (IN During) (NP (BASENP (DT the) (NN invasion)) (PP (IN of) (BASENP (NNP Iraq))))) (PRN (COMMA ,) (NP (BASENP (NN lead)) (PP (IN by) (BASENP (DT the) (NNP United) (NNPS States)))) (COMMA ,))) (S (BASENP (NN oil) (NN output)) (VP (VBD was) (PP (IN at) (NP (NP (BASENP (QP (RB about) (NN 2) (NN million)) (NNS barrels)) (PP (IN per) (BASENP (NN day)))) (PRN (LRB -LRB-) (BASENP (NN bpd)) (RRB -RRB-))))))) (CC and) (S (PP (IN before) (BASENP (DT the) (NN invasion))) (S (BASENP (NN oil) (NN production)) (VP (VBD ranged) (PP (PP (IN from) (BASENP (QP (NN 3) (NN million)))) (PP (TO to) (NP (PRN (COMMA ,) (PP (IN at) (BASENP (PRPD its) (NN peak))) (COMMA ,)) (BASENP (QP (NN 3.5) (NN million)) (NN bpd))))))))) (PERIOD .))