<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_reveal_set():
 """ Returns a set of all the topics that are interesting for REVEAL use-cases. """

    file_path = get_package_path() + "/twitter/res/topics/story_set.txt"
    story_topics = get_topic_set(file_path)

    file_path = get_package_path() + "/twitter/res/topics/theme_set.txt"
    theme_topics = get_topic_set(file_path)

    file_path = get_package_path() + "/twitter/res/topics/attribute_set.txt"
    attribute_topics = get_topic_set(file_path)

    file_path = get_package_path() + "/twitter/res/topics/stance_set.txt"
    stance_topics = get_topic_set(file_path)

    file_path = get_package_path() + "/twitter/res/topics/geographical_set.txt"
    geographical_topics = get_topic_set(file_path)

    topics = story_topics | theme_topics | attribute_topics | stance_topics | geographical_topics

    return topics