Question: When did local dialing code 571 go into effect for Fairfax County?
Choices: 1924-01-01
1945-08-17
2012-06-22
2011-07-13
1988-02-13
2001-09-09
2000-03-01
1994-07-12
2009-08-07
2002-06-02
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Fairfax County" . ?e <local_dialing_code> ?pv . ?pv <pred:value> "571" . [ <pred:fact_h> ?e ; <pred:fact_r> <local_dialing_code> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Fairfax County
function: QueryAttrQualifier
dependencies: 0
inputs: local dialing code
571
start time
Answer: 2000-03-01