Question: Since when does the association football club, whose Twitter username is  rostovfc (the subscription number of this statement is 309620), use Ростов as the official name ?
Choices:
1993-07-28
2010-10-26
2005-07-04
1993-01-03
1960-08-25
1991-09-08
2002-04-11
1822
2003
1950-03-07
Answer: 2003
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "association football club" . ?e <Twitter_username> ?pv_1 . ?pv_1 <pred:value> "rostovfc" . [ <pred:fact_h> ?e ; <pred:fact_r> <Twitter_username> ; <pred:fact_t> ?pv_1 ] <number_of_subscribers> ?qpv_1 . ?qpv_1 <pred:unit> "1" . ?qpv_1 <pred:value> "309620"^^xsd:double . ?e <official_name> ?pv . ?pv <pred:value> "Ростов" . [ <pred:fact_h> ?e ; <pred:fact_r> <official_name> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
rostovfc
function: QFilterNum
dependencies: 1
inputs: number of subscribers
309620
=
function: FilterConcept
dependencies: 2
inputs: association football club
function: QueryAttrQualifier
dependencies: 3
inputs: official name
Ростов
start time