Question: What city in the US is the birthplace of George Duke, the pianist?
Choices:
Tuscaloosa
Waukegan
Meridian
Franklin
Akron
San Rafael
New Haven
Oakland
Columbus
Laguna Beach
Answer: San Rafael
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city of the United States" . ?e_1 <place_of_birth> ?e . ?e_1 <pred:name> "George Duke" . ?e_1 <instrument> ?e_2 . ?e_2 <pred:name> "piano" .   }
Program:
function: Find
inputs: piano
function: Relate
dependencies: 0
inputs: instrument
backward
function: Find
inputs: George Duke
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: place of birth
forward
function: FilterConcept
dependencies: 4
inputs: city of the United States
function: What
dependencies: 5