Nevertheless, they constituted a potential resource for al Qaeda.
( Nevertheless ( , ( they ( ( ( constituted ( a ( potential resource ) ) ) ( for ( al Qaeda ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Nevertheless)) (, ,) (NP (PRP they)) (VP (VBD constituted) (NP (DT a) (JJ potential) (NN resource)) (PP (IN for) (NP (NNP al) (NNP Qaeda)))) (. .)))
They were absolutely opposed to al Qaeda and could not be considered a resource. 
( They ( ( ( ( were ( absolutely ( opposed ( to ( al Qaeda ) ) ) ) ) and ) ( ( could not ) ( be ( considered ( a resource ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VP (VBD were) (ADJP (RB absolutely) (VBN opposed) (PP (TO to) (NP (NNP al) (NNP Qaeda))))) (CC and) (VP (MD could) (RB not) (VP (VB be) (VP (VBN considered) (NP (DT a) (NN resource)))))) (. .)))