driven by a natural sense for what works 
(ROOT (S (VP (VBN driven) (PP (IN by) (NP (NP (DT a) (JJ natural) (NN sense)) (PP (IN for) (SBAR (WHNP (WP what)) (S (VP (VBZ works))))))))))
(ROOT (S (VP (VBN ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (SBAR (WHNP (WP )) (S (VP (VBZ ))))))))))