Question: Does the city where Peter Cushing died have an OS grid reference of SO515405?
Choices: yes
no
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unknown
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SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "city" . ?e_1 <place_of_death> ?e . ?e_1 <pred:name> "Peter Cushing" .  ?e <OS_grid_reference> ?pv . ?pv <pred:value> "SO515405" .  }
Program:
function: Find
inputs: Peter Cushing
function: Relate
dependencies: 0
inputs: place of death
forward
function: FilterConcept
dependencies: 1
inputs: city
function: QueryAttr
dependencies: 2
inputs: OS grid reference
function: VerifyStr
dependencies: 3
inputs: SO515405
Answer: no