The amount of information on the internet is increasing every day and it is very difficult to find exact information from big list of search results. Users typically generate query specifying keywords and the search engine displays documents, what contains keywords what were set by user. Search within unstructured data starts from data processing: first of all documents are braked into sentences, then words and word groups are analyzed semantically and syntactically, to obtain facts. Facts describe objects of real world. Facts obtained from unstructured data will be stored into database, and unstructured data will be transformed into structured data. Afterwards it will be easy to analyze, conjunct, filter or do other manipulations with structured data.