One or more computing devices, systems, and/or methods are provided. An informational database may be analyzed based upon an entity to identify an informational article. The informational article may be analyzed to identify one or more first references associated with a first sentiment category and/or one or more second references associated with a second sentiment category. Sentiment tags, indicative of sentiment categories, may be assigned to one or more first reference content items associated with the one or more first references and/or to one or more second reference content items associated with the one or more second references. For each content item of a plurality of content items associated with the entity, a sentiment category associated with the content item may be determined based upon a comparison of the content item with the one or more first reference content items and the one or more second reference content items.