( ( ( Allow ( for flexibility ) ) ( when ( writing ( performance objectives ) ) ) ) . )
(ROOT (S (VP (VB Allow) (PP (IN for) (NP (NN flexibility))) (SBAR (WHADVP (WRB when)) (S (VP (VBG writing) (NP (NN performance) (NNS objectives)))))) (. .)))
Allow for flexibility when writing performance objectives.
(ROOT (S (NP (NP (DT The) (NN flexibility)) (PP (IN of) (NP (DT an) (NN object)))) (VP (VBZ allows) (S (NP (PRP it)) (VP (TO to) (VP (VB bend))))) (. .)))
The flexibility of an object allows it to bend.