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 might be afraid he'll lose his No.
( He ( ( might ( be ( afraid ( he ( 'll ( lose ( his No ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (MD might) (VP (VB be) (ADJP (JJ afraid) (SBAR (S (NP (PRP he)) (VP (MD 'll) (VP (VB lose) (NP (PRP$ his) (NN No))))))))) (. .)))