Early Programming Languages (A Logic Puzzle)

Chris Okasaki (of Purely Functional Data Structures fame) gives us Early Programming Languages (A Logic Puzzle)

Try not to use your domain-specific knowledge.

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That's odd...

Why hasn't anyone posted a solution in Prolog yet?

(Or are we all too busy?)

Or...

...Oz or Screamer?

It was a very good year

His grid appears to be missing 1959 as one of the years.