Wulczyn et al. (2017) also provide two additional datasets of English Wikipedia talk page comments, which are not used in this paper. The first one, called 'aggression' dataset, contains the same comments as the 'attacks' dataset, now labeled as 'aggressive' or not. The (probabilistic) labels of the 'attacks' and 'aggression' datasets are very highly correlated (0.8992 Spearman, 0.9718 Pearson) and we did not consider the aggression dataset any further. The second additional dataset, called 'toxicity' dataset, contains approx. 160K comments labeled as being toxic or not.