Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving multiple resources, each resource including electronic media content. For each resource, a computing system identifies one or more entities that are associated with the resource. For at least one pair of identified entities, the system determines a quantity of resources in which each entity of the pair is associated. The system determines, based on the quantity of resources, an occurrence of an event that is associated with a particular pair of entities. The system generates a representation that corresponds to the event and based on the resources in which each entity of the pair of entities is associated. The system provides, for output to a user device, the representation that corresponds to the event.