Question: When did Chet Atkins create his amateur radio callsign of W4CGP?
Choices: 2011-09-13
1964-05-10
1992-02-24
1992-07-31
1998
1801-07-01
1932-01-01
2010-04-21
1970-07-01
1945-10-25
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Chet Atkins" . ?e <amateur_radio_callsign> ?pv . ?pv <pred:value> "W4CGP" . [ <pred:fact_h> ?e ; <pred:fact_r> <amateur_radio_callsign> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Chet Atkins
function: QueryAttrQualifier
dependencies: 0
inputs: amateur radio callsign
W4CGP
start time
Answer: 1998