( ( ( 11 Reasons ) ( for ( ( the ( Seasons Seasons ) ) ( on Earth ) ) ) ) ( ( are ( caused ( by ( ( the tilt ) ( of ( ( the ( planet 's ) ) ( rotational axis ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD 11) (NNS Reasons)) (PP (IN for) (NP (NP (DT the) (NNPS Seasons) (NNPS Seasons)) (PP (IN on) (NP (NNP Earth)))))) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (NP (DT the) (NN tilt)) (PP (IN of) (NP (NP (DT the) (NN planet) (POS 's)) (JJ rotational) (NNS axis))))))) (. .)))
11 Reasons for the Seasons Seasons on Earth are caused by the tilt of the planet's rotational axis.
(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))))))))))) (. .)))