Question: What is the Twitter username for the public university whose headquarters is located in Colchester in the country of the United Kingdom?
Choices: PelicansNBA
imkristenbell
cstross
oscar8
UbisoftFR
gregayres
SerieA
robbiewilliams
Uni_of_Essex
ParamountPics
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "public university" . ?e <headquarters_location> ?e_1 . ?e_1 <pred:name> "Colchester" .  [ <pred:fact_h> ?e ; <pred:fact_r> <headquarters_location> ; <pred:fact_t> ?e_1 ] <country> ?qpv . ?qpv <pred:value> "United Kingdom" . ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: Colchester
function: Relate
dependencies: 0
inputs: headquarters location
backward
function: QFilterStr
dependencies: 1
inputs: country
United Kingdom
function: FilterConcept
dependencies: 2
inputs: public university
function: QueryAttr
dependencies: 3
inputs: Twitter username
Answer: Uni_of_Essex