11 In the unanswerable and unanswered tasks, we find that the BOW features do not perform significantly better than a random (50%) baseline.
the latent question features produced by our framework bring additional predictive signal and outperform the baseline when combined with BOW (binomial p < 0.05), achieving accuracies of 66% and 62% respectively (compared with 55% and 50% for BOW alone).