Question: For the metropolitan area whose external data URL is https://datausa.io/profile/geo/washington-arlington-alexandria-dc-va-md-wv-metro-area/, what is the time point for its population of 5100000?
Choices: 2001-08-22
2002-01-01
2009-04-01
1911
2016-12-31
802701
2017-03-28
2013-03-05
2015-07-31
2016
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "metropolitan area" . ?e <external_data_available_at> ?pv_1 . ?pv_1 <pred:value> "https://datausa.io/profile/geo/washington-arlington-alexandria-dc-va-md-wv-metro-area/" . ?e <population> ?pv . ?pv <pred:unit> "1" . ?pv <pred:value> "5100000"^^xsd:double . [ <pred:fact_h> ?e ; <pred:fact_r> <population> ; <pred:fact_t> ?pv ] <point_in_time> ?qpv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: external data available at
https://datausa.io/profile/geo/washington-arlington-alexandria-dc-va-md-wv-metro-area/
function: FilterConcept
dependencies: 1
inputs: metropolitan area
function: QueryAttrQualifier
dependencies: 2
inputs: population
5100000
point in time
Answer: 2016