Though novel for its open endorsement of indiscriminate killing, Bin Ladin's 1998 declaration was only the latest in the long series of his public and private calls since 1992 that singled out the United States for attack.
( ( Though ( novel ( for ( ( its ( open endorsement ) ) ( of ( indiscriminate killing ) ) ) ) ) ) ( , ( ( ( Bin ( Ladin 's ) ) ( 1998 declaration ) ) ( ( was ( ( ( only ( the latest ) ) ( in ( ( the ( long series ) ) ( of ( ( his ( ( ( public and ) private ) calls ) ) ( since 1992 ) ) ) ) ) ) ( that ( ( singled out ) ( ( the ( United States ) ) ( for attack ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Though) (NP (NP (NN novel)) (PP (IN for) (NP (NP (PRP$ its) (JJ open) (NN endorsement)) (PP (IN of) (NP (JJ indiscriminate) (NN killing))))))) (, ,) (NP (NP (NNP Bin) (NNP Ladin) (POS 's)) (CD 1998) (NN declaration)) (VP (VBD was) (NP (NP (RB only) (DT the) (JJS latest)) (PP (IN in) (NP (NP (DT the) (JJ long) (NN series)) (PP (IN of) (NP (NP (PRP$ his) (UCP (JJ public) (CC and) (JJ private)) (NNS calls)) (PP (IN since) (NP (CD 1992))))))) (SBAR (WHNP (WDT that)) (S (VP (VBD singled) (PRT (RP out)) (NP (NP (DT the) (NNP United) (NNPS States)) (PP (IN for) (NP (NN attack))))))))) (. .)))
Bin Ladin had a history of campaigning for an attack on the United States.
( ( Bin Ladin ) ( ( ( had ( ( a history ) ( of campaigning ) ) ) ( for ( ( an attack ) ( on ( the ( United States ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Bin) (NNP Ladin)) (VP (VBD had) (NP (NP (DT a) (NN history)) (PP (IN of) (NP (NN campaigning)))) (PP (IN for) (NP (NP (DT an) (NN attack)) (PP (IN on) (NP (DT the) (NNP United) (NNPS States)))))) (. .)))