Thanks for taking the time to put this together — there are a lot of good techniques here.
For some readers and projects it may not be necessary to download wiki data to perform queries. DBPedia hosts an RDF datastore with almost all of the in formation and relationships that you see in info boxes. If you know SPARQL you can use the query API to perform queries. Here is an example of a simple query to get all information associated with the film “Cast Away.”