when his story ends or just ca n't tear himself away from the characters 
(ROOT (SBAR (WHADVP (WRB when)) (S (S (NP (PRP$ his) (NN story)) (VP (VBZ ends))) (CC or) (ADVP (RB just)) (VP (MD ca) (RB n't) (VP (VB tear) (NP (PRP himself)) (ADVP (RB away) (PP (IN from) (NP (DT the) (NNS characters)))))))))
(ROOT (SBAR (WHADVP (WRB )) (S (S (NP (PRP$ ) (NN )) (VP (VBZ ))) (CC ) (ADVP (RB )) (VP (MD ) (RB ) (VP (VB ) (NP (PRP )) (ADVP (RB ) (PP (IN ) (NP (DT ) (NNS )))))))))