( ( The seasons ) ( ( are ( caused ( because ( ( the ( Earth ( s axis ) ) ) ( is tilted ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS seasons)) (VP (VBP are) (VP (VBN caused) (SBAR (IN because) (S (NP (DT the) (NNP Earth) (NNP s) (NNS axis)) (VP (VBZ is) (VP (VBN tilted))))))) (. .)))
The seasons are caused because the Earth s axis is tilted.
(ROOT (S (NP (NP (DT The) (NN tilt)) (PP (IN of) (NP (NP (NN earth)) (PP (IN on) (NP (PRP$ its) (NNS axis)))))) (VP (VBZ is) (NP (NP (CD one) (NN factor)) (SBAR (WHNP (WDT that)) (S (VP (VBZ contributes) (PP (TO to) (NP (NP (NNS seasons)) (VP (VBG occurring) (PP (IN in) (NP (JJ new) (NN york) (NN state))))))))))) (. .)))