There are two main parts in this keynote talk. The first one is devoted to the overview of R&D in information extraction domain fulfilled by academic institutions and commercial organizations in Russia. Main topics in this part deal with the discussion of multilingual documents collections processing methods and appropriate instrumental tools for information extraction. Second part of the talk presents semantic technology oriented to the Semantic Web applications development and implementation elaborated in cooperation by the specialists of Computer Centre of Russian Academy of Sciences, Russian IT-company “Avicomp Services”, and company Ontos AG from Switzerland. Some challenges of shadow knowledge highlighting are outlined.