only a fleeting grasp of how to develop them 
(ROOT (NP (NP (RB only) (DT a) (JJ fleeting) (NN grasp)) (PP (IN of) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB develop) (NP (PRP them)))))))))
(ROOT (NP (NP (RB ) (DT ) (JJ ) (NN )) (PP (IN ) (SBAR (WHADVP (WRB )) (S (VP (TO ) (VP (VB ) (NP (PRP )))))))))