Question: How accurate is the source of the birth date 1770-12-16 for the person who studied under Joseph Haydn?
Choices: circa
average
de facto
de jure
verified account
1.4219
fiscal year
error
playwright
presumably
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <student> ?e . ?e_1 <pred:name> "Joseph Haydn" .  ?e <date_of_birth> ?pv . ?pv <pred:date> "1770-12-16"^^xsd:date . [ <pred:fact_h> ?e ; <pred:fact_r> <date_of_birth> ; <pred:fact_t> ?pv ] <sourcing_circumstances> ?qpv .  }
Program:
function: Find
inputs: Joseph Haydn
function: Relate
dependencies: 0
inputs: student
forward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttrQualifier
dependencies: 2
inputs: date of birth
1770-12-16
sourcing circumstances
Answer: presumably