In the sparse feature system, the highest weighted features are typically those indicating the frequency that a page was linked to and those indicating specific lexical items in the choice of the latent query variable q. This suggests that the system of<cite> Durrett and Klein (2014)</cite> has the power to pick the right span of a mention to resolve, but then is left to generally pick the most common link target in Wikipedia, which is not always correct. By contrast, the full system has a greater ability to pick less common link targets if the topic indicators distilled from the CNNs indicate that it should do so.