def load_rttm(file_path):
    """ rttm file to dictionary """
    rttm = {}
    with open(file_path, 'r') as _file_path:
        for line in _file_path:
            line = line.split()
            meeting_name = line[1]
            start = float(line[3])
            duration = float(line[4])
            rttm.setdefault(meeting_name, []).append((start, start + duration))
    return rttm