( They ( ( ( estimate ( ( ( about ( five ( times ( as many ) ) ) ) owners ) ( of ( pet primates ) ) ) ) ( as ( ( primate owners ) ( with ( USDA licenses ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP estimate) (NP (NP (QP (RB about) (CD five) (NNS times) (IN as) (JJ many)) (NNS owners)) (PP (IN of) (NP (JJ pet) (NNS primates)))) (PP (IN as) (NP (NP (JJ primate) (NNS owners)) (PP (IN with) (NP (NNP USDA) (NNS licenses)))))) (. .)))
They estimate about five times as many owners of pet primates as primate owners with USDA licenses.
(ROOT (S (NP (NNS Primates)) (VP (VBP have) (NP (NP (CD five) (NNS digits)) (PP (IN on) (NP (DT each) (NN extremity))))) (. .)))