While the serving code still works the code to download Wikipedia dumps and summarise them has bitrotted.
The database is circa 2013, so you’re exploring a nearly 11 year old summary of Wikipedia!
The database is circa 2013, so you’re exploring a nearly 11 year old summary of Wikipedia!
It looks like FOO (all caps) redirected to Forward Observation Officer on July 2008, says https://en.wikipedia.org/w/index.php?title=FOO&action=histor... so there was a narrow window when your "foo" example worked as described, before you updated the dump to the then-new redirect.