( ( ( ( ( Sea otters ) ( are ( very active ) ) ) and ) ( ( ( ( ( ( ( playful animals ) , ) and ) as ) ( a result ) ) , ) ( need ( to ( ( eat ( ( an equivalent ) ( of one ) ) ) ( fourth ( ( their ( body weight ) ) ( a day ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Sea) (NNS otters)) (VP (VBP are) (ADJP (RB very) (JJ active)))) (CC and) (S (NP (NP (JJ playful) (NNS animals)) (, ,) (CC and) (RB as) (NP (DT a) (NN result)) (, ,)) (VP (VBP need) (S (VP (TO to) (VP (VB eat) (NP (NP (DT an) (NN equivalent)) (PP (IN of) (NP (CD one)))) (ADVP (JJ fourth) (NP (NP (PRP$ their) (NN body) (NN weight)) (NP (DT a) (NN day))))))))) (. .)))
Sea otters are very active and playful animals, and as a result, need to eat an equivalent of one fourth their body weight a day.
(ROOT (S (NP (NNP Sea) (NNS otters)) (VP (VBP are) (VP (VBN known) (PP (IN for) (S (VP (VBG being) (ADJP (JJ playful) (CC and) (JJ frisky))))))) (. .)))