( There ( ( was ( ( a change ) ( in ( ( the actors ) ( ( playing ( certain characters ) ) ( in ( season two ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NNS actors)) (VP (VBG playing) (NP (JJ certain) (NNS characters)) (PP (IN in) (NP (NN season) (CD two)))))))) (. .)))
There was a change in the actors playing certain characters in season two.
(ROOT (S (NP (NP (DT A) (NN change)) (PP (IN of) (NP (NP (NN season)) (CC and) (NP (JJR less) (NN food))))) (ADVP (RB usually)) (VP (VB cause) (S (NP (JJ certain) (NNS animals)) (VP (TO to) (VP (VB migrate))))) (. .)))
A change of season and less food usually cause certain animals to migrate.