1. A method for providing content, the method being implemented by one or more processors and comprising: analyzing a content item to determine geographic information that is relevant to an image of the content item; determining one or more interests of a person depicted in the content item, wherein the one or more interests are based on an assumption or probabilistic conclusion from application of one or more rules that utilize the geographic information; and selecting a supplemental content item to provide to a viewer of the content item based on the one or more interests.