This example also shows how data from multiple markup languages can be fused together, for instance the URL field being populated by the Open Graph extractor. In the last step, Bob can revisit the mapping rules, specify a URL pattern and finally save both the data and the mapping definitions. Luckily, the pattern is straightforward as URLs to movies on IMDb all share a common path. Afterwards, Bob continues to visit web pages of other movies and decides to gather some of them too. At this point, the information can be extracted right away and there is no need to re-create the mapping rules. Later, he visits a conference event calendar, and repeats the steps above for the individual web pages of upcoming conferences. Again, the pre-defined mappings for events help Bob specifying more comprehensive extraction rules.