def label_breakdown(data):
    """ Find the label breakdown in data. """
    res = {}
    for row in data:
        # if valid label
        if (row[3]):
            res[row[1]] = row[7]
            
    neg, neu, pos = 0, 0, 0
    for key in res.keys():
        r = res[key]
        if (r == -1):
            neg += 1
        elif (r == 0):
            neu += 1
        else: 
            pos += 1
    return "{} / {} / {}".format(neg, neu, pos)