( ( The ( other factor ) ) ( ( is ( ( ( the tilt ) ( of ( ( the ( Earth 's ) ) axis ) ) ) ( to ( the Sun ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ other) (NN factor)) (VP (VBZ is) (NP (NP (DT the) (NN tilt)) (PP (IN of) (NP (NP (DT the) (NN Earth) (POS 's)) (NNS axis))) (PP (TO to) (NP (DT the) (NNP Sun))))) (. .)))
The other factor is the tilt of the Earth's axis to 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))))))))))) (. .)))