def avg_title_vec(record, lookup):
    avg_vec = []
    word_vectors = []
    for tag in record['all_titles']:
        titles = clean_token(tag).split()
        for word in titles:
            if word in lookup.value:
                word_vectors.append(lookup.value[word])
    if len(word_vectors):
        avg_vec = [
            float(val) for val in numpy.mean(
                numpy.array(word_vectors),
                axis=0)]

    output = (record['id'],
              ','.join([str(a) for a in avg_vec]))
    return output