[dleslie]

I'm curious about Relational Lisp. It had the shortest development time, 3h to Haskell's 10/8; a middling/low number of lines of code, at 274; and only 12 lines of documentation.

It describes Relational Lisp as being Lisp enhanced with a database-like language for logic programming.

I suspect this may be it:

https://oceanpark.com/ap5.html

https://www.ap5.com/

There's a C2 entry for it, of course:

https://wiki.c2.com/?RelationalLispWeenie