Question: What is the publication date of Today whose color is black-and-white?
Choices:
2010-11-24
2015-03-13
2007-11-29
2001-08-16
2011-08-09
2009-02-15
1984-09-14
2005-01-27
1930-01-01
2013-03-24
Program:
function: Find
inputs: black-and-white
function: Relate
dependencies: 0
inputs: color
backward
function: Find
inputs: Today
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: publication date
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Today" . ?e <color> ?e_1 . ?e_1 <pred:name> "black-and-white" .  ?e <publication_date> ?pv .  }
Answer: 1930-01-01