Also, did he mean the entire revision history of Wikipedia, or just the most recent versions of pages?
As for anyone curious:
https://dumps.wikimedia.org/enwiki/20180320/
The article text contains Wikipedia markup which is a bit difficult to remove but not impossible, there are some existing projects for doing that. DBPedia would have the raw text, but it's not nearly as current.
http://dumps.wikimedia.your.org/other/cirrussearch/
These are structured with a JSON string for each doc roughly like https://en.m.wikipedia.org/wiki/Foobar?action=cirrusdump