Question: Who participated in 1980 Winter Olympics.
Choices: Robert Young
Richard Gere
Max Fleischer
Sylvester Stallone
Howie Mandel
Mark Johnson
Ben Johnson
Houssine Kharja
William Henry Harrison
Danny Glover
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <participant_of> ?e_1 . ?e_1 <pred:name> "1980 Winter Olympics" .   }
Program:
function: Find
inputs: 1980 Winter Olympics
function: Relate
dependencies: 0
inputs: participant of
backward
function: FilterConcept
dependencies: 1
inputs: human
function: What
dependencies: 2
Answer: Mark Johnson