( ( ( ( ( ( ( The Hamster ) , ) Mice ) , ) and ) ( Rat families ) ) ( ( were ( grouped ( in ( the ( Rodent order ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN Hamster)) (, ,) (NP (NNS Mice)) (, ,) (CC and) (NP (NNP Rat) (NNS families))) (VP (VBD were) (VP (VBN grouped) (PP (IN in) (NP (DT the) (NNP Rodent) (NN order))))) (. .)))
The Hamster, Mice, and Rat families were grouped in the Rodent order.
(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))) (. .)))