5 are highly correlated during summer months in some areas.
( 5 ( ( are ( highly ( correlated ( during ( ( summer months ) ( in ( some areas ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD 5)) (VP (VBP are) (ADJP (RB highly) (JJ correlated) (PP (IN during) (NP (NP (NN summer) (NNS months)) (PP (IN in) (NP (DT some) (NNS areas))))))) (. .)))
Nothing is correlated to the summer in all areas.  
( Nothing ( ( is ( correlated ( to ( ( the summer ) ( in ( all areas ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Nothing)) (VP (VBZ is) (VP (VBN correlated) (PP (TO to) (NP (NP (DT the) (NN summer)) (PP (IN in) (NP (DT all) (NNS areas))))))) (. .)))