import operator


def _get_best_sentence(entity_scores, entity_sentences):
    """
    Retrieve best sentences given a batch of scores and sentences
    :param entity_scores: scores
    :param entity_sentences: sentences
    :return: pair of user review and sentence
    """
    best_entity = max(entity_scores.items(), key=operator.itemgetter(1))[0]
    if best_entity in entity_sentences:
        return entity_sentences[best_entity]
    else:
        return "", ""