( This ( ( makes ( southern ( hemisphere ( summer ( and ( northern ( hemisphere winter ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ makes) (NP (JJ southern) (NN hemisphere) (NN summer) (CC and) (JJ northern) (NN hemisphere) (NN winter))) (. .)))
This makes southern hemisphere summer and northern hemisphere winter.
(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 causes) (NP (NN summer)) (S (VP (TO to) (VP (VB be) (VP (VBN warmer) (PP (IN than) (NP (NP (NN winter)) (PP (IN in) (NP (DT the) (JJ northern) (NN hemisphere))))) (SBAR (IN because) (S (NP (NP (DT the) (NNS rays)) (PP (IN of) (NP (DT the) (NN sun)))) (VP (VBP strike) (NP (DT the) (JJ northern) (NN hemisphere)) (ADVP (ADVP (RBR more) (RB directly)) (PP (IN in) (NP (DT the) (NN summer)))))))))))) (. .)))