Question: What is the marriage date that Ossie Davis is the spouse of Ruby Dee?
Choices: 1992-05-23
2002-01-01
2011-04-03
1968-04-06
1776-07-04
1948-12-09
2017-09-05
1990-06-15
1869
1956-01-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Ossie Davis" . ?e_2 <pred:name> "Ruby Dee" . ?e_1 <spouse> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <spouse> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Ossie Davis
function: Find
inputs: Ruby Dee
function: QueryRelationQualifier
dependencies: 0
1
inputs: spouse
start time
Answer: 1948-12-09