Question: When did Barack Obama acquire the Twitter username POTUS44?
Choices:
1979-02-11
2017-01-20
2012-01-23
2011-12-28
1985-04-19
1965-12-21
2012-04-17
1919-11-09
1944-10-13
2005-01-01
Answer: 2017-01-20
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Barack Obama" . ?e <Twitter_username> ?pv . ?pv <pred:value> "POTUS44" . [ <pred:fact_h> ?e ; <pred:fact_r> <Twitter_username> ; <pred:fact_t> ?pv ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Barack Obama
function: QueryAttrQualifier
dependencies: 0
inputs: Twitter username
POTUS44
start time