(S (S (S (NP (BASENP (PRP They)) (BASENP (DT all))) (VP (VBD had) (BASENP (JJ heat-retaining) (NNS drysuits)))) (CC but) (S (S (BASENP (PRP it)) (VP (VBD was) (VP (VBN unknown)))) (SBAR (IN if) (S (BASENP (PRP they)) (VP (VBD were) (VP (VP (VBG wearing) (BASENP (PRP them))) (PP (IN at) (BASENP (DT the) (NN time))))))))) (PERIOD .))