( But ( , ( ( the ( continuing rain ) ) ( ( ( convinced us ) ( that ( we ( needed ( to ( seek ( some shelter ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (CC But) (, ,) (NP (DT the) (JJ continuing) (NN rain)) (VP (VBD convinced) (NP (PRP us)) (SBAR (IN that) (S (NP (PRP we)) (VP (VBD needed) (S (VP (TO to) (VP (VB seek) (NP (DT some) (NN shelter))))))))) (. .)))
But, the continuing rain convinced us that we needed to seek some 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))))))) (. .)))