Question: Which state became a UN member in 1990?
Choices:
Cuba
Liechtenstein
Kosovo
Malta
Finland
Namibia
Antigua and Barbuda
Bulgaria
Denmark
Sweden
Answer: Liechtenstein
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "state" . ?e <member_of> ?e_1 . ?e_1 <pred:name> "United Nations" .  [ <pred:fact_h> ?e ; <pred:fact_r> <member_of> ; <pred:fact_t> ?e_1 ] <start_time> ?qpv . ?qpv <pred:year> 1990 .  }
Program:
function: Find
inputs: United Nations
function: Relate
dependencies: 0
inputs: member of
backward
function: QFilterYear
dependencies: 1
inputs: start time
1990
=
function: FilterConcept
dependencies: 2
inputs: state
function: What
dependencies: 3