Al Qaeda's role in organizing terrorist operations had also changed.
( ( ( ( Al ( Qaeda 's ) ) role ) ( in ( organizing ( terrorist operations ) ) ) ) ( ( ( had also ) changed ) . ) )
(ROOT (S (NP (NP (NP (NNP Al) (NNP Qaeda) (POS 's)) (NN role)) (PP (IN in) (NP (VBG organizing) (JJ terrorist) (NNS operations)))) (VP (VBD had) (ADVP (RB also)) (VP (VBN changed))) (. .)))
The role Al Qaeda played in organizing terrorist operations later changed.
( ( ( The role ) ( ( Al Qaeda ) ( played ( in ( organizing ( terrorist operations ) ) ) ) ) ) ( later ( changed . ) ) )
(ROOT (S (NP (NP (DT The) (NN role)) (SBAR (S (NP (NNP Al) (NNP Qaeda)) (VP (VBD played) (PP (IN in) (S (VP (VBG organizing) (NP (JJ terrorist) (NNS operations))))))))) (ADVP (RB later)) (VP (VBD changed)) (. .)))