( They ( ( have ( ( ( ( four to ) five ) digits ) ( on ( each ( ( leg or ) arm ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP have) (NP (NP (QP (CD four) (TO to) (CD five)) (NNS digits)) (PP (IN on) (NP (DT each) (NN leg) (CC or) (NN arm))))) (. .)))
They have four to five digits on each leg or arm.
(ROOT (S (NP (NNS Primates)) (VP (VBP have) (NP (NP (CD five) (NNS digits)) (PP (IN on) (NP (DT each) (NN extremity))))) (. .)))