For now (until someone offers a reasonable explanation), after playing the game twice and being sorely disappointed, I'm convinced that Six Degrees of Wikipedia is a hoax.
First I tried "Bach" to "Antarctica." Results:
Johann Sebastian Bach
Those words were nowhere to be found in their "related" articles.
Then I tried "John the Baptist" to "moonshine." Results:
John the Baptist
List of city nicknames
"List of city nicknames" links to a message that says, "Wikipedia does not have an article with this exact name." Wanna write it? Heck no!
I am sad and mad.