Question: When did the conservatory where Mstislav Rostropovich works have a staff of 40?
Choices: 1900
2017-11-12
1851
2011-06-12
1942-01-01
1961-01-01
2018-04-14
1913-11-13
2009-06-03
2013-10-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "conservatory" . ?e_1 <employer> ?e . ?e_1 <pred:name> "Mstislav Rostropovich" .  ?e <employees> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "40"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <employees> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv .  }
Program:
function: Find
inputs: Mstislav Rostropovich
function: Relate
dependencies: 0
inputs: employer
forward
function: FilterConcept
dependencies: 1
inputs: conservatory
function: QueryAttrQualifier
dependencies: 2
inputs: employees
40
point in time
Answer: 1900