Bin Ladin apparently kept his options open, maintaining contacts with Gulbuddin Hekmatyar, who, though an Islamic extremist, was also one of the Taliban's most militant opponents.
( ( Bin Ladin ) ( apparently ( ( ( ( kept ( ( his options ) open ) ) , ) ( ( maintaining contacts ) ( with ( ( ( Gulbuddin Hekmatyar ) , ) ( who ( , ( ( though ( an ( Islamic extremist ) ) ) ( , ( ( was also ) ( one ( of ( ( the ( Taliban 's ) ) ( most ( militant opponents ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Bin) (NNP Ladin)) (ADVP (RB apparently)) (VP (VBD kept) (S (NP (PRP$ his) (NNS options)) (ADJP (JJ open))) (, ,) (S (VP (VBG maintaining) (NP (NNS contacts)) (PP (IN with) (NP (NP (NNP Gulbuddin) (NNP Hekmatyar)) (, ,) (SBAR (WHNP (WP who)) (S (, ,) (PP (IN though) (NP (DT an) (JJ Islamic) (NN extremist))) (, ,) (VP (VBD was) (ADVP (RB also)) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (NNP Taliban) (POS 's)) (JJS most) (JJ militant) (NNS opponents)))))))))))) (. .)))
Bin Ladin refused to work with anyone else.
( ( Bin Ladin ) ( ( refused ( to ( work ( with ( anyone else ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Bin) (NNP Ladin)) (VP (VBD refused) (S (VP (TO to) (VP (VB work) (PP (IN with) (NP (NN anyone) (RB else))))))) (. .)))