def _tagged_data_to_parsed(overwrite=False):
    # Take tagged data and covert it to parsed Trees in files
    for root, dirs, files in os.walk(os.path.join(_EVENT_EVAL_DATA_PATH,
                                                  "tagged")):
        for f in files:
            parsed_fn = os.path.splitext(f)[0] + '.parsed'
            parsed_filepath = os.path.join(_EVENT_EVAL_DATA_PATH,
                                           "parsed",
                                           parsed_fn)
            if os.path.exists(parsed_filepath) and not overwrite:
                print ("file {0} already exists, skipping..."
                       "".format(parsed_filepath))
                continue
            tree = NLTKParseTree("TEXT", [])
            tagged_tokens = load_file(os.path.join(root, f), "tagged")
            tree = EventChunkParser._tagged_to_parse(tagged_tokens)
            with open(parsed_filepath, 'w') as parsed_fh:
                parsed_fh.write(tree.pprint())