Question: When did the Winter Olympic Games that were followed by the 1968 Winter Olympics start?
Choices: 1793-03-04
1989-01-01
1941
1964-01-29
1968-01-01
1998-11-20
1428
2004-10-19
1965-11-11
2005-01-26
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "Winter Olympic Games" . ?e <followed_by> ?e_1 . ?e_1 <pred:name> "1968 Winter Olympics" .  ?e <start_time> ?pv .  }
Program:
function: Find
inputs: 1968 Winter Olympics
function: Relate
dependencies: 0
inputs: followed by
backward
function: FilterConcept
dependencies: 1
inputs: Winter Olympic Games
function: QueryAttr
dependencies: 2
inputs: start time
Answer: 1964-01-29