( ( Their ( amniotic eggs ) ) ( ( ( ( have ( hard shells ) ) and ) ( are ( laid ( in ( a nest ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Their) (JJ amniotic) (NNS eggs)) (VP (VP (VBP have) (NP (JJ hard) (NNS shells))) (CC and) (VP (VBP are) (VP (VBN laid) (PP (IN in) (NP (DT a) (NN nest)))))) (. .)))
Their amniotic eggs have hard shells and are laid in a nest.
(ROOT (S (NP (NNS Mammals)) (VP (VP (VBP have) (NP (CD four) (NNS limbs))) (CC and) (VP (VBP produce) (NP (JJ amniotic) (NNS eggs)))) (. .)))