Question: What is the Twitter username of teh agent that is the airline alliance of United Airlines?
Choices:
thomasjane
senbillnelson
JennifersWayJE
UniofBath
clarkgregg
staralliance
magdalenoxford
UUtah
dcfcofficial
rampalarjun
Answer: staralliance
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "agent" . ?e_1 <airline_alliance> ?e . ?e_1 <pred:name> "United Airlines" .  ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: United Airlines
function: Relate
dependencies: 0
inputs: airline alliance
forward
function: FilterConcept
dependencies: 1
inputs: agent
function: QueryAttr
dependencies: 2
inputs: Twitter username