1. An information processing apparatus comprising: a grouping unit that detects a part of an object from contents and performs grouping of each object; a correlation degree calculating unit that calculates a correlation degree between the objects of which the grouping is performed by the grouping unit; and a display control unit that controls a display of a diagram of a correlation between the objects indicating the correlation between the objects, based on the correlation degree between the objects which is calculated by the correlation degree calculating unit.