Question: When was a number of students, associated with the 'agent' (education place) where Igor Stravinsky used to study, equal to 870 ?
Choices: 2010-02-01
1963-01-01
2006-03-15
2008-04-23
2014-09-20
1789-01-01
1900
2010
1968-12-01
1655-01-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "agent" . ?e_1 <educated_at> ?e . ?e_1 <pred:name> "Igor Stravinsky" .  ?e <students_count> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "870"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <students_count> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv .  }
Program:
function: Find
inputs: Igor Stravinsky
function: Relate
dependencies: 0
inputs: educated at
forward
function: FilterConcept
dependencies: 1
inputs: agent
function: QueryAttrQualifier
dependencies: 2
inputs: students count
870
point in time
Answer: 1900