( Sharks ( ( ( reproduce sexually ) ( with ( internal fertilization ) ) ) . ) )
(ROOT (S (NP (NNS Sharks)) (VP (VB reproduce) (ADVP (RB sexually)) (PP (IN with) (NP (JJ internal) (NN fertilization)))) (. .)))
Sharks reproduce sexually with internal fertilization.
(ROOT (S (NP (NNS Amphibians)) (ADVP (RB sexually)) (VP (VB reproduce) (PP (IN through) (NP (JJ external) (CC or) (JJ internal) (NN fertilization)))) (. .)))