Semantic Technology and Business Conference 2012 SemTechBiz PR Newswire LONDON, June 25, 2012 LONDON, June 25, 2012 /PRNewswire/ -- Professor Nigel Shadbolt, Co-Director, Open Data Institute, Confirmed As Keynote Speaker Rising Media and WebMediaBrands, producers of the Semantic Technology and Business Conference (SemTechBiz), have announced details of this year's event, the