(S (S (ADVP (RB Currently)) (COMMA ,) (S (BASENP (DT the) (JJS oldest) (JJ known) (NNS footwear)) (VP (VBP are) (NP (BASENP (NNS sandals)) (VP (VP (VBN made) (PP (IN from) (BASENP (NN sagebrush) (NN bark)))) (COMMA ,) (VP (VBN found) (PP (IN in) (NP (NP (BASENP (NNP Fort) (NNP Rock) (NNP Cave)) (COMMA ,) (BASENP (NNP Oregon))) (PP (IN in) (BASENP (DT the) (NNP United) (NNPS States))))))))))) (PERIOD .))