( Spiders ( ( ( reproduce sexually ) ( via ( internal fertilization ) ) ) . ) )
(ROOT (S (NP (NNS Spiders)) (VP (VB reproduce) (ADVP (RB sexually)) (PP (IN via) (NP (JJ internal) (NN fertilization)))) (. .)))
Spiders reproduce sexually via 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)))) (. .)))