1. An information processing device comprising: one or more processors configured to: create an event cluster including photo content and social content of a social networking service, wherein the social content indicates a same event as the photo content; create meta information associated with the event based on at least one of the photo content or the social content, wherein the meta information comprises event title information indicating a title of the event, event generation period information indicating a period in which the event occurred, event generation place information indicating a place where the event occurred, event main-character information indicating a main character of the event, or event attribute information indicating an attribute of the event.