( ( ( ( ( They ( produce ( amniotic eggs ) ) ) , ) and ) ( ( ( the majority ) ( of ( the time ) ) ) ( they ( have ( a ( leathery ( kind ofcovering ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP They)) (VP (VBP produce) (NP (JJ amniotic) (NNS eggs)))) (, ,) (CC and) (S (NP (NP (DT the) (NN majority)) (PP (IN of) (NP (DT the) (NN time)))) (NP (PRP they)) (VP (VBP have) (NP (DT a) (JJ leathery) (NN kind) (NN ofcovering)))) (. .)))
They produce amniotic eggs, and the majority of the time they have a leathery kind ofcovering.
(ROOT (S (NP (NNS Mammals)) (VP (VP (VBP have) (NP (CD four) (NNS limbs))) (CC and) (VP (VBP produce) (NP (JJ amniotic) (NNS eggs)))) (. .)))