14. The apparatus of claim 11 , wherein executing a model comprises, for each person in the multiple people: generating a corresponding feature vector comprising: a set of name features derived from occurrences of the new personal name in the electronic content item; and a set of affiliation features derived from occurrences of names of affiliations of the person in the electronic content item; applying the model to the person's corresponding feature vector; and receiving as output from the model an indication as to whether the new personal name refers to the person.
14. The apparatus of claim 11 , wherein executing a model comprises, for each person in the multiple people: generating a corresponding feature vector comprising: a set of name features derived from occurrences of the new personal name in the electronic content item; and a set of affiliation features derived from occurrences of names of affiliations of the person in the electronic content item; applying the model to the person's corresponding feature vector; and receiving as output from the model an indication as to whether the new personal name refers to the person. 15. The apparatus of claim 14 , wherein the set of affiliation features comprises: for each of one or more types of affiliations: an indication whether the electronic content item references the affiliation; and a total number of references to the affiliation within the electronic content item; and a number of unique affiliations referenced in the electronic content item.