Question: I want to know the front that has an time prior to 1981 and that is part of European theater of World War 1.
Choices: Los Angeles Kings
The Wolfman
Scott Wilson
Western Front
I Love You Phillip Morris
Arizona Coyotes
Hilo
Ayumi Hamasaki
Shin-ichiro Miki
The Three Musketeers
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "front" . ?e <end_time> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1981 ) . ?e <part_of> ?e_1 . ?e_1 <pred:name> "European theatre of World War I" .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: end time
1981
<
function: FilterConcept
dependencies: 1
inputs: front
function: Find
inputs: European theatre of World War I
function: Relate
dependencies: 3
inputs: part of
backward
function: FilterConcept
dependencies: 4
inputs: front
function: And
dependencies: 2
5
function: What
dependencies: 6
Answer: Western Front