1. A method comprising: identifying extracted-from-article entities extracted from content of an article; identifying a set of related entities, wherein each related entity in the set of related entities is related to at least one of the extracted-from-article entities; performing searches on the extracted-from-article entities and the set of related entities; identifying quality search results from the searches based at least on one or more measures of relevancy; maintaining a plurality of different search results templates, wherein each search results template of the plurality of different search results templates is associated a corresponding set of constraints; from the extracted-from-article entities and the related entities, selecting a plurality of template-matching entities; wherein the plurality of template-matching entities includes a first entity and a second entity; wherein the plurality of template-matching entities are selected based, at least in part, on the quality search results produced for each template-matching entity meeting the constraints for at least one search results template of the plurality of different search results templates; generating a supplement including two or more sections, each of the two or more sections corresponding to a different template-matching entity of the plurality of template-matching entities; wherein the two or more sections include a first section that corresponds to the first entity, and a second section that corresponds to the second entity; wherein each particular section of the two or more sections displays the quality search results obtained for the template-matching entity that corresponds to the particular section; selecting a first template, of the different search result templates, for the first section based on types of the quality search results to be displayed in the first section; selecting a second template, of the different search result templates, for the second section based on types of the quality search results to be displayed in the second section; wherein the first template is different from the second template; displaying, within the supplement, quality search results in the first section arranged according to the first template, and quality search results in the second section arranged according to the second template; wherein the method is performed by one or more computing devices.
1. A method comprising: identifying extracted-from-article entities extracted from content of an article; identifying a set of related entities, wherein each related entity in the set of related entities is related to at least one of the extracted-from-article entities; performing searches on the extracted-from-article entities and the set of related entities; identifying quality search results from the searches based at least on one or more measures of relevancy; maintaining a plurality of different search results templates, wherein each search results template of the plurality of different search results templates is associated a corresponding set of constraints; from the extracted-from-article entities and the related entities, selecting a plurality of template-matching entities; wherein the plurality of template-matching entities includes a first entity and a second entity; wherein the plurality of template-matching entities are selected based, at least in part, on the quality search results produced for each template-matching entity meeting the constraints for at least one search results template of the plurality of different search results templates; generating a supplement including two or more sections, each of the two or more sections corresponding to a different template-matching entity of the plurality of template-matching entities; wherein the two or more sections include a first section that corresponds to the first entity, and a second section that corresponds to the second entity; wherein each particular section of the two or more sections displays the quality search results obtained for the template-matching entity that corresponds to the particular section; selecting a first template, of the different search result templates, for the first section based on types of the quality search results to be displayed in the first section; selecting a second template, of the different search result templates, for the second section based on types of the quality search results to be displayed in the second section; wherein the first template is different from the second template; displaying, within the supplement, quality search results in the first section arranged according to the first template, and quality search results in the second section arranged according to the second template; wherein the method is performed by one or more computing devices. 7. The method of claim 1 , wherein the first entity is an extracted-from-article entity extracted from the article; and the second entity is a related entity, not found in the content of the article, that is related to one or more extracted-from-article entities extracted from the content of the article.