( ( ( ( This undercoat ) and ) ( some hair ) ) ( naturally ( ( sheds ( as ( ( temperature ( and ( day length ) ) ) ( ( ( increase seasonally ) , ) ( leaving ( a ( shorter ( , ( ( smooth summer ) coat ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT This) (NN undercoat)) (CC and) (NP (DT some) (NN hair))) (ADVP (RB naturally)) (VP (VBZ sheds) (SBAR (IN as) (S (NP (NN temperature) (CC and) (NN day) (NN length)) (VP (VB increase) (ADVP (RB seasonally)) (, ,) (S (VP (VBG leaving) (NP (DT a) (JJR shorter) (, ,) (ADJP (JJ smooth) (NP (NN summer))) (NN coat)))))))) (. .)))
This undercoat and some hair naturally sheds as temperature and day length increase seasonally, leaving a shorter, smooth summer coat.
(ROOT (S (NP (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN increase)) (PP (IN in) (NP (NN length)))) (VP (VBZ happens) (PP (TO to) (NP (NN metal) (NN railroad) (NNS tracks))) (PP (IN during) (NP (NP (DT the) (NN heat)) (PP (IN of) (NP (DT a) (NN summer) (NN day)))))) (. .)))