( ( Most arthropods ) ( sexually reproduce ) )
(ROOT (S (NP (JJS Most) (NNS arthropods)) (VP (ADVP (RB sexually)) (VBN reproduce))))
Most arthropods sexually reproduce
(ROOT (S (NP (JJS Most) (NN fish)) (VP (VB reproduce) (PP (IN with) (NP (CD one) (DT another))) (ADVP (RB sexually))) (. .)))