( ( ( ( ( It ( was ( only ( ( ( ( a ( light rain ) ) , ) but ) ( a ( cold rain ) ) ) ) ) ) , ) and ) ( he ( decided ( to ( seek shelter ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBD was) (NP (RB only) (NP (DT a) (JJ light) (NN rain)) (, ,) (CC but) (NP (DT a) (JJ cold) (NN rain))))) (, ,) (CC and) (S (NP (PRP he)) (VP (VBD decided) (S (VP (TO to) (VP (VB seek) (NP (NN shelter))))))) (. .)))
It was only a light rain, but a cold rain, and he decided to seek shelter.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP it)) (VP (VBZ rains)))) (, ,) (NP (DT some) (NNS animals)) (VP (MD will) (VP (VB move) (S (VP (TO to) (VP (VB seek) (NP (NN shelter))))))) (. .)))