Question: When was the baseball team headquartered in Washington, D.C. first officially named Montreal Expos?
Choices: 2008-04-29
1992-07-17
1950-07-01
1969
2011-06-24
1963-04-01
1999-01-31
2017-01-20
1976-01-01
1992-03-16
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "baseball team" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:name> "Washington, D.C." .  ?e <official_name> ?pv . ?pv <pred:value> "Montreal Expos" . [ <pred:fact_h> ?e ; <pred:fact_r> <official_name> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Washington, D.C.
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: FilterConcept
dependencies: 1
inputs: baseball team
function: QueryAttrQualifier
dependencies: 2
inputs: official name
Montreal Expos
start time
Answer: 1969