( ( The seasons ) ( ( occur ( because ( ( ( Earth 's ) axis ) ( is ( ( tilted ( with respect ) ) ( to ( ( its orbit ) ( of ( the Sun ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS seasons)) (VP (VBP occur) (SBAR (IN because) (S (NP (NP (NNP Earth) (POS 's)) (NNS axis)) (VP (VBZ is) (VP (VBN tilted) (PP (IN with) (NP (NN respect))) (PP (TO to) (NP (NP (PRP$ its) (NN orbit)) (PP (IN of) (NP (DT the) (NNP Sun)))))))))) (. .)))
The seasons occur because Earth's axis is tilted with respect to its orbit of the Sun.
(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))))))))))) (. .)))