Opinion mining by Vox-Pop

Vox-Pop (http://www.vox-pop.nl/) provides funny gadgets that show the power of so-called opinion mining or sentiment analysis. The site uses natural language processing tools find named entities (person names), and to detect if the individual was mentioned in a positive, negative or neutral way. See below what the “vox populi” think of Dutch football players and trainers. But… why don't they mention Blaise N'Kufo?