Question: Is the Reddit username of the person associated with vocal music serenawilliams?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <genre> ?e_1 . ?e_1 <pred:name> "vocal music" .  ?e <Reddit_username> ?pv . ?pv <pred:value> "serenawilliams" .  }
Program:
function: Find
inputs: vocal music
function: Relate
dependencies: 0
inputs: genre
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: Reddit username
function: VerifyStr
dependencies: 3
inputs: serenawilliams
Answer: no