Question: What is the publication date of Saskatchewan (the one that has Alan Ladd as a cast member)?
Choices: 1962-04-12
2002-07-31
2014-03-08
1989-07-14
1954-01-01
2014-10-25
2004-11-26
1988-02-18
1993-11-05
2005-09-02
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Saskatchewan" . ?e <cast_member> ?e_1 . ?e_1 <pred:name> "Alan Ladd" .  ?e <publication_date> ?pv .  }
Program:
function: Find
inputs: Alan Ladd
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Saskatchewan
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: publication date
Answer: 1954-01-01