Question: What is the beginning date that Per ardua ad astra is the motto text for the Royal Canadian Air Force?
Choices: 1852
1924
1937-01-30
1900-01-01
1918-10-28
1919-02-05
1992-06-30
1997-08-11
1991-11-26
2012-06-25
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Royal Canadian Air Force" . ?e <motto_text> ?pv . ?pv <pred:value> "Per ardua ad astra" . [ <pred:fact_h> ?e ; <pred:fact_r> <motto_text> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Royal Canadian Air Force
function: QueryAttrQualifier
dependencies: 0
inputs: motto text
Per ardua ad astra
start time
Answer: 1924