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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 reorg_crawl_tasks(tasks, concurrency, logger=None):
 """ Extract content returned by the crawler `iter_crawl_tasks` member method. :return: tuple made of the sub-tasks to executed, the epilogue task to execute or `None` is none was specified by the crawler, and the proper tasks concurrency level. :rtype: tuple (sub-tasks, epilogue, concurrent) """

    futures = tasks['tasks']
    epilogue = tasks.get('epilogue')
    custom_concurrency = tasks.get('max_concurrent_tasks', concurrency)
    check_custom_concurrency(concurrency, custom_concurrency, logger)
    futures = list(futures)
    return futures, epilogue, concurrency