Question: What is the publication date for the silent film written by Victor Hugo?
Choices: 2002-04-15
2009-11-17
2008-02-06
2009-01-22
1997-06-30
1923-01-01
1929-01-01
1938-09-27
1994-07-06
2013-03-24
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "silent film" . ?e <after_a_work_by> ?e_1 . ?e_1 <pred:name> "Victor Hugo" .  ?e <publication_date> ?pv .  }
Program:
function: Find
inputs: Victor Hugo
function: Relate
dependencies: 0
inputs: after a work by
backward
function: FilterConcept
dependencies: 1
inputs: silent film
function: QueryAttr
dependencies: 2
inputs: publication date
Answer: 1923-01-01