Information retrieval is currently part of our everyday life. Search engines make it possible to find information from the web. Because the amount of information is huge, the search engines are usually constructed so that they rank the information and retrieve only what they consider relevant for the user. The earlier searches of the user may give hints to the search engine. In other words, the search engines try to guess what kind on information we are interested in. There are also such information retrieval needs, where we want to get all relevant information, and that the result does not include any non-relevant information. We want covering and precise information. For the needs of the latter type of information retrieval we need first to analyse and disambiguate the source text and then do the search to this text format. This report describes the latter type of information retrieval using Suomen perustuslaki (the Constitution of Finland) and Katiba (the Constitution of Tanzania) as source texts.