Hey,
(query "select * from table1;" :plists t)
It is not a keyword argument. Rather, there is a regular optional argument that gets a keyword value that determines the output format. (query "select * from table1;" :plists) should work.
P.S. What's with the Croatia example ? I'm from Croatia.
I was living in Zagreb when I wrote part of the documentation. Great country!
Best, Marijn