Question: When was William Gibson (the one whose date of death is 1890-02-01) born?
Choices: 1265
1944-03-06
1883-07-19
1940-09-19
1815-01-01
1873-01-07
1906-08-21
1941-02-08
1944-05-05
1980-01-30
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "William Gibson" . ?e <date_of_death> ?pv_1 . ?pv_1 <pred:date> "1890-02-01"^^xsd:date . ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: William Gibson
function: FilterDate
dependencies: 0
inputs: date of death
1890-02-01
=
function: QueryAttr
dependencies: 1
inputs: date of birth
Answer: 1815-01-01