( ( Placental mammals ) ( ( are ( very ( active ( animals ( ; ( possess ( ( ( acute senses ) and ) ( a ( ( relatively large ) brain ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Placental) (NNS mammals)) (VP (VBP are) (ADJP (RB very) (JJ active) (SBAR (S (NP (NNS animals)) (: ;) (VP (VBP possess) (NP (NP (JJ acute) (NNS senses)) (CC and) (NP (DT a) (ADJP (RB relatively) (JJ large)) (NN brain)))))))) (. .)))
Placental mammals are very active animals; possess acute senses and a relatively    large brain.
(ROOT (S (NP (JJ Placental) (NNS mammals)) (VP (VBP give) (NP (NN birth)) (PP (TO to) (NP (ADJP (RB relatively) (JJ large)) (NNS fetuses)))) (. .)))