"weed out sites that don't offer useful information."
I call this 'the Guthram Gowt effect'. It is a perfect test case: a bend in the river that goes back to the domesday book but which currently consists of 3 scattered houses, a bus stop, and a rain gauge.
So you can guarantee that any promise of 'Florists in Guthram Gowt' or 'Jobs in Guthram Gowt' is worthless. And, by simple deduction, the same site's results for any other location will be just as worthless.
I just ran the test again. Only two of the results on the first page were useful, and then not incredibly so. One from Geograph and one synthetic bus table lookup. All the others are made up nonsense. Sites that have carpet-bombed the world with the name of every place-name possible.
The first really sensible hit was "boar.org.uk/abiwxe1BournePlaces(home.htm" on page 2. Then it went downhill again. with more non-existant jobs, dates, used cars and empty 'community ' pages. The real bus timetable was on page 5.
You don't need an AI. You just need voting buttons. Ones that agregate every vote for a site, so that downvotes or upvotes for 'Guthram Gowt' hits count against hits for 'Snittlegarth' or 'High Bewaldeth'
(I'm looking at you AllTheTopBananas.com ; www.primelocation.com ; www.qype.co.uk : "User recommendations and reviews of the best things in Graby. Find the best shops, restaurants, bars, nightlife, gigs, services and more." Even Paris could not find a night club in Graby)
If someone can cure the Guthram Gowt Effect it will be a great thing.