(S (S (NP (BASENP (JJ Other) (JJ possible) (NNS factors)) (PP (IN such) (PP (IN as) (NP (BASENP (NN wind)) (CC or) (BASENP (NN sunlight) (NN direction)))))) (VP (VP (VBD did) (RB not)) (VP (VB supply) (NP (BASENP (DT a) (JJR better) (NN explanation)) (PP (IN for) (BASENP (DT the) (NN behavior))))))) (PERIOD .))