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))) (. .)))
Al Qaeda later took on a different role when it came to terrorist operations.
( ( Al Qaeda ) ( later ( ( ( took ( on ( a ( different role ) ) ) ) ( when ( it ( came ( to ( terrorist operations ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Al) (NNP Qaeda)) (ADVP (RB later)) (VP (VBD took) (PP (IN on) (NP (DT a) (JJ different) (NN role))) (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBD came) (PP (TO to) (NP (JJ terrorist) (NNS operations))))))) (. .)))