Question: What is the Twitter username for the television station that broadcasted Roots (featuring cast member Laurence Fishburne) originally?
Choices: robinhoodmovie
NBC
justinbieber
Mattel
littlerichard_
HISTORY
RepAdamSmith
ItsTheJFF
kevinfcorrigan
Kaj33
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "television station" . ?e_1 <original_network> ?e . ?e_1 <pred:name> "Roots" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Laurence Fishburne" .  ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: Laurence Fishburne
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Roots
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: original network
forward
function: FilterConcept
dependencies: 4
inputs: television station
function: QueryAttr
dependencies: 5
inputs: Twitter username
Answer: HISTORY