what is the name of the events at the olympics with the least number of participating nations?
Entity
m.04fk2j_
Men's football
class class literal
olympics.olympic_event olympics.olympic_games 0^^http://www.w3.org/2001/XMLSchema#int
olympics.olympic_event olympics.olympic_games type.int
Olympic event Olympic games 0
none none argmin
olympics.olympic_event.contested_as_demonstration_event olympics.olympic_games.number_of_countries
Contested as demonstration event in Number Of Nations
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :olympics.olympic_event . 
?x1 :type.object.type :olympics.olympic_games . 
{
SELECT (MIN(?y2) AS ?x2)  WHERE { 
?y0 :type.object.type :olympics.olympic_event . 
?y1 :type.object.type :olympics.olympic_games . 
?y0 :olympics.olympic_event.contested_as_demonstration_event ?y1 . 
?y1 :olympics.olympic_games.number_of_countries ?y2 . 
FILTER ( ?y0 != ?y1 && ?y0 != ?y2 && ?y1 != ?y2  )
}
}
?x0 :olympics.olympic_event.contested_as_demonstration_event ?x1 . 
?x1 :olympics.olympic_games.number_of_countries ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(ARGMIN olympics.olympic_event (JOIN olympics.olympic_event.contested_as_demonstration_event olympics.olympic_games.number_of_countries))