(S (S (NP (BASENP (NN Dating)) (PP (IN of) (BASENP (NN charcoal) (NNS fragments)))) (VP (VBD revealed) (SBAR (IN that) (S (BASENP (DT the) (NN site)) (VP (VBD was) (VP (VP (VBN inhabited) (ADVP (ADVP (RB as) (RB early)) (PP (IN as) (BASENP (NN 7200) (NN BC))))) (PP (IN by) (NP (BASENP (NNS groups)) (PP (IN of) (BASENP (NNS hunter-gatherers))))))))))) (PERIOD .))