A content server generates a media channel including a plurality of media items. A request for a media channel is received from a client device of a user, the request including a free-form media input seed identifying a plurality of ambiguous entities. A plurality of media playlists of media items is determined where each media playlist is associated with a corresponding one of the plurality of ambiguous entities identified by the free-form media input seed. The plurality of media playlists are combined into the media channel that includes media items selected from among the plurality of media playlists. The media channel is provided to the client device.