But it just might be because he's afraid he'll lose his No.
( But ( it ( just ( ( might ( be ( because ( he ( 's ( afraid ( he ( 'll ( lose ( his No ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (CC But) (NP (PRP it)) (ADVP (RB just)) (VP (MD might) (VP (VB be) (SBAR (IN because) (S (NP (PRP he)) (VP (VBZ 's) (ADJP (JJ afraid) (SBAR (S (NP (PRP he)) (VP (MD 'll) (VP (VB lose) (NP (PRP$ his) (NN No)))))))))))) (. .)))
He's definitely not afraid of losing his No.
( He ( ( ( ( 's definitely ) not ) ( afraid ( of ( losing ( his No ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBZ 's) (ADVP (RB definitely)) (RB not) (ADJP (JJ afraid) (PP (IN of) (S (VP (VBG losing) (NP (PRP$ his) (NN No))))))) (. .)))