( ( Sea otters ) ( ( were ( ( one species ) ( of ( animals ( that ( was ( affected ( by ( the ( oil spill ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Sea) (NNS otters)) (VP (VBD were) (NP (NP (CD one) (NNS species)) (PP (IN of) (NP (NP (NNS animals)) (SBAR (WHNP (WDT that)) (S (VP (VBD was) (VP (VBN affected) (PP (IN by) (NP (DT the) (NN oil) (NN spill))))))))))) (. .)))
Sea otters were one species of animals that was affected by the oil spill.
(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))))))) (. .)))