def reduce_list_of_bags_of_words(list_of_keyword_sets):
    """
    Reduces a number of keyword sets to a bag-of-words.

    Input:  - list_of_keyword_sets: This is a python list of sets of strings.

    Output: - bag_of_words: This is the corresponding multi-set or bag-of-words, in the form of a python dictionary.
    """
    bag_of_words = dict()
    get_bag_of_words_keys = bag_of_words.keys
    for keyword_set in list_of_keyword_sets:
        for keyword in keyword_set:
            if keyword in get_bag_of_words_keys():
                bag_of_words[keyword] += 1
            else:
                bag_of_words[keyword] = 1
    return bag_of_words
