Comparing the different types of annotations, on a high-level, we can see that recall, in particular, varies widely across categories; unsurprisingly perhaps, systems, in general, exhibit higher recall for proper nouns (particularly full and extended names) with direct references.
while much work has been done on the topic, we first present the results of a survey that reveal a lack of consensus in the community regarding what forms of mentions in a text and what forms of links the EL task should consider.