1. A scene information extraction apparatus comprising: a first acquisition unit configured to acquire a plurality of comment information items related to video content which defines scenes in a time-sequence manner, each of the plurality of comment information items including a comment, and a start time and an end time of the comment, the comment corresponding to a user who has viewed the video content; a division unit configured to divide the comment into words by morpheme analysis for each of the plurality of comment information items; a second acquisition unit configured to acquire an estimated value of each of the words, the estimated value indicating a degree of importance used at a time that a scene corresponding to a zone of the video content extracted; an addition unit configured to add the estimated value of each of the words for the words during a period of time ranging from the start time of the comment to the end time of the comment that contains a corresponding word included in the words, and to acquire estimated value distributions of the words; and an extraction unit configured to extract a start time and an end time of one scene included in the scenes and to be extracted from the video content, based on a shape of the estimated value distributions.