Question: When did  Shanghai (the one that is the twinned administrative body of Montreal) become the twinned administrative body of Winston-Salem?
Choices: 1995-01-28
2010-07-20
1990-10-03
1939-09-19
1930-03-17
1835
2006-01-01
2006-10-16
1997-12-14
1929
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Shanghai" . ?e_1 <twinned_administrative_body> ?e_3 . ?e_3 <pred:name> "Montreal" . ?e_2 <pred:name> "Winston-Salem" . ?e_1 <twinned_administrative_body> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <twinned_administrative_body> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Montreal
function: Relate
dependencies: 0
inputs: twinned administrative body
backward
function: Find
inputs: Shanghai
function: And
dependencies: 1
2
function: Find
inputs: Winston-Salem
function: QueryRelationQualifier
dependencies: 3
4
inputs: twinned administrative body
start time
Answer: 2006-01-01