Question: What is the Twitter username of William H. Johnson, who starred in Abraham Lincoln: Vampire Hunter?
Choices: BrianTylerMusic
RealMeatLoaf
CollingwoodFC
jeweljk
universityofga
goldiehawn
nickcave
AnthonyMackie
mca_music
IAMQUEENLATIFAH
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <cast_member> ?e . ?e_1 <pred:name> "Abraham Lincoln: Vampire Hunter" .  [ <pred:fact_h> ?e_1 ; <pred:fact_r> <cast_member> ; <pred:fact_t> ?e ] <character_role> ?qpv . ?qpv <pred:value> "William H. Johnson" . ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: Abraham Lincoln: Vampire Hunter
function: Relate
dependencies: 0
inputs: cast member
forward
function: QFilterStr
dependencies: 1
inputs: character role
William H. Johnson
function: FilterConcept
dependencies: 2
inputs: human
function: QueryAttr
dependencies: 3
inputs: Twitter username
Answer: AnthonyMackie