Question: When did the musical composition with the triangle, which was started in 1890, started?
Choices: 1896
1991-06-25
1993-03-16
1903-01-01
2007-11-13
2017-06-01
1991-08-12
2017-01-30
1992-03-12
2007-03-07
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "musical composition" . ?e <instrumentation> ?e_1 . ?e_1 <pred:name> "triangle" .  ?e <inception> ?pv . ?pv <pred:year> 1890 . [ <pred:fact_h> ?e ; <pred:fact_r> <inception> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: triangle
function: Relate
dependencies: 0
inputs: instrumentation
backward
function: FilterConcept
dependencies: 1
inputs: musical composition
function: QueryAttrQualifier
dependencies: 2
inputs: inception
1890
start time
Answer: 1896