( ( ( ( ( ( many ( of ( these trees ) ) ) ( are ( ( four feet ) ( in diameter ) ) ) ) , ) and ) ( ( forty feet ) ( clear ( of limbs ) ) ) ) . )
(ROOT (S (S (NP (NP (JJ many)) (PP (IN of) (NP (DT these) (NNS trees)))) (VP (VBP are) (NP (NP (CD four) (NNS feet)) (PP (IN in) (NP (NN diameter)))))) (, ,) (CC and) (S (NP (JJ forty) (NNS feet)) (ADJP (JJ clear) (PP (IN of) (NP (NNS limbs))))) (. .)))
many of these trees are four feet in diameter, and forty feet clear of limbs.
(ROOT (S (NP (NNP Birds)) (VP (VBP have) (NP (CD four) (NNS limbs))) (. .)))