def combine_scorevectors(vec_1, vec_2):
    """Combining two entity-scores, e.g. 
    (e_1, s_1, a_1) and (e_2, s_2, a_2)"""
    total_agreements = vec_1[2] + vec_2[2]
    normed_sentiment = (vec_1[1] * vec_1[2] + vec_2[1] * vec_2[2]) / total_agreements
    return (vec_1[0], normed_sentiment, total_agreements)