Question: Did the war representing Mstislav Rostropovich conclude prior to 2017 ?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "war" . ?e_1 <conflict> ?e . ?e_1 <pred:name> "Mstislav Rostropovich" .  ?e <end_time> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 2017 ) .  }
Program:
function: Find
inputs: Mstislav Rostropovich
function: Relate
dependencies: 0
inputs: conflict
forward
function: FilterConcept
dependencies: 1
inputs: war
function: QueryAttr
dependencies: 2
inputs: end time
function: VerifyYear
dependencies: 3
inputs: 2017
<
Answer: yes