def au_theater(name):
    """
    Add a preposition and article to a theater name to make it locative
    """
    if not name:
        return ''
    loc = {
        'Théâtre': 'au ',
        'Th.': 'au ',
        'Académie': "à l'",
        'Cirque': 'au ',
        'Fêtes': 'aux ',
        'Cour': 'à la ',
        'Opéra-Comique-Nationale': "à l'"
        }
    first_word = name.split(' ')[0]
    return loc.get(first_word, '') + name