def METHOD_NAME(self, word, category):
    """Returns the lemma of a word given its category
    Args:
        word: string to extract to extract its lemma
        category: Grammatical category of that word
    Returns:
        The lemma of a word given its lemma
        For example:
            lemma=Lemmatizer()
            output= lemma.lemmatize_word_category('meeting','v')
            print output
            >> 'meet'
    """
    if WORDNET_LEMMATIZER == self.lemmatizer_selected:
        return self.lemmatizer.lemmatize(word, category)