Compare the two input statements.

        :return: The percent of similarity between the closest synset distance.
        :rtype: float

def compare(self, statement_a, statement_b):
        """
        Compare the two input statements.

        :return: The percent of similarity between the closest synset distance.
        :rtype: float
        """
        document_a = self.nlp(statement_a.text)
        document_b = self.nlp(statement_b.text)

        return document_a.similarity(document_b)