by an energy that puts the dutiful efforts of more disciplined grade-grubbers 
(ROOT (PP (IN by) (NP (NP (DT an) (NN energy)) (SBAR (WHNP (WDT that)) (S (VP (VBZ puts) (NP (NP (DT the) (JJ dutiful) (NNS efforts)) (PP (IN of) (NP (ADJP (RBR more) (VBN disciplined)) (NN grade) (HYPH -) (NNS grubbers))))))))))
(ROOT (PP (IN ) (NP (NP (DT ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (NP (DT ) (JJ ) (NNS )) (PP (IN ) (NP (ADJP (RBR ) (VBN )) (NN ) (HYPH ) (NNS ))))))))))