def deleteData():
    """
        Delete all the data
    """
    masters = Master.all()
    for master in masters:
        Master.delete(master)

    mapReduces = MapReduce.all()
    for mapReduce in mapReduces:
        MapReduce.delete(mapReduce)

    articles = Article.all()
    for article in articles:
        Article.delete(article)

    authors = Author.all()
    for author in authors:
        Author.delete(author)

    artCitedBibs = ArtCitedBib.all()
    for artCitedBib in artCitedBibs:
        ArtCitedBib.delete(artCitedBib)