In 1998, Iraq was under intensifying U.S. pressure, which culminated in a series of large air attacks in December.
( ( In 1998 ) ( , ( Iraq ( ( was ( under ( ( ( intensifying ( U.S. pressure ) ) , ) ( which ( culminated ( in ( ( a series ) ( of ( ( large ( air attacks ) ) ( in December ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (CD 1998))) (, ,) (NP (NNP Iraq)) (VP (VBD was) (PP (IN under) (NP (NP (VBG intensifying) (NNP U.S.) (NN pressure)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBN culminated) (PP (IN in) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NP (JJ large) (NN air) (NNS attacks)) (PP (IN in) (NP (NNP December))))))))))))) (. .)))
The U.S. backed out of plans to attack Iraq in late 1998.
( ( The U.S. ) ( ( ( ( backed out ) ( of plans ) ) ( to ( attack ( Iraq ( in ( late 1998 ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP U.S.)) (VP (VBD backed) (PRT (RP out)) (PP (IN of) (NP (NNS plans))) (S (VP (TO to) (VP (VB attack) (NP (NP (NNP Iraq)) (PP (IN in) (NP (JJ late) (CD 1998)))))))) (. .)))