Hi Jane and Gerard,
Thanks for the suggestions! Labels are definitely a very important consideration - will have a think about this.
On your questions, Jane, the people we've been working with have increasingly been adding quite a lot of "occupation:politician" statements, and even more specific things, like P39 statements indicating actual roles. Let me know if you want to know more :)
Thanks all for perspectives so far, keep 'em coming and hopefully we'll be able to get something in motion along these lines before too long!
L