the earliest contest start date is what?
Entity
m.05gj9mt
Election for king of the Romans in 1002
class literal
government.election 0^^http://www.w3.org/2001/XMLSchema#int
government.election type.datetime
Election contest 0
none argmin
time.event.start_date
Start date
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 :government.election . 
{
SELECT (MIN(?y1) AS ?x1)  WHERE { 
?y0 :type.object.type :government.election . 
?y0 :time.event.start_date ?y1 . 
FILTER ( ?y0 != ?y1  )
}
}
?x0 :time.event.start_date ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(ARGMIN government.election time.event.start_date)