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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def VerifyStructure(self, parser_mediator, line):
 """Verify that this file is a Sophos Anti-Virus log file. Args: parser_mediator (ParserMediator):
 mediates interactions between parsers and other components, such as storage and dfVFS. line (str):
 line from a text file. Returns: bool: True if the line is in the expected format, False if not. """

    try:
      structure = self._LOG_LINE.parseString(line)
    except pyparsing.ParseException:
      logger.debug('Not a Sophos Anti-Virus log file')
      return False

    # Expect spaces at position 9 and 16.
    if ' ' not in (line[8], line[15]):
      logger.debug('Not a Sophos Anti-Virus log file')
      return False

    try:
      dfdatetime_time_elements.TimeElements(
          time_elements_tuple=structure.date_time)
    except ValueError:
      logger.debug((
          'Not a Sophos Anti-Virus log file, invalid date and time: '
          '{0!s}').format(structure.date_time))
      return False

    return True