Abstract: To achieve accurate classification of posts into related and unrelated ones in a short time and at low cost by performing automatic data labeling in supervised learning. An apparatus for extracting content-related posts, including a microblog collection section that collects posts by using an API provided by the microblog, a classification section that classifies titles into titles having multiple meanings and titles not having multiple meanings, and a microblog relevance determination section that determines the relevance of posts to content depending on whether the title has multiple meanings.

Abstract: A discussion enlivenment assistance device includes: a state visualization unit which generates discussion state data displaying index values indicating a state of each discussion site; a user characteristic presentation unit which generates participating user characteristic data in relation to users participating in a discussion site specified by a user, the participating user characteristic data displaying index values indicating profiles of the users in a discussion; a user control unit which generates invitation nominated user data displaying an invitation nominated user appropriate for the discussion site specified by the user; and a display unit which displays the discussion state data, the participating user characteristic data, and the invitation nominated user data.