( ( ( Rats and ) mice ) ( ( ( ( are ( ( the ( largest group ) ) ( of rodents ) ) ) , ) ( comprising ( ( some 1,300 ) species ) ) ) . ) )
(ROOT (S (NP (NNS Rats) (CC and) (NNS mice)) (VP (VBP are) (NP (NP (DT the) (JJS largest) (NN group)) (PP (IN of) (NP (NNS rodents)))) (, ,) (S (VP (VBG comprising) (NP (QP (DT some) (CD 1,300)) (NNS species))))) (. .)))
Rats and mice are the largest group of rodents, comprising some 1,300 species.
(ROOT (S (NP (NP (DT The) (NN name)) (PP (IN of) (NP (NP (DT the) (NN group)) (SBAR (IN that) (S (NP (NNS rats)) (VP (VBP are) (NP (NP (DT a) (NN part)) (PP (IN of))))))))) (VP (VBZ is) (NP (NNS rodents))) (. .)))