semantic search engine domains

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hi every one
first i'm so sorry for my poor english
i was working on semantic search engine that searchs in movies Subtitling files
In short steps :
1- bulding crawler : This agent is to travel the web and collect the Srt files from most common sites that are specialize in translated movies
2- building personal RDF repository from srt files after parsing and NLP processing
3- linked RDF files to DBpedia and DubinCore ..........
3- Get query from user and make RDF files from this query ...........
4- using matching function between RDF from query and others from my personal store
5- view movies information that are resulted from matching
6- making some additional extensions that are based on multimedia systems like view movies - extract concrete frames - Detection algorithms ......................


my question :
can anyone suggesting other domain i can use like this semantic search engine .
not in movies files . any hints or ideas are so welcome
thank for all ................