what patent office has the patent with the smallest issue date?
Entity
m.01fzds
United States Patent and Trademark Office
class class literal
law.patent_office law.us_patent 0^^http://www.w3.org/2001/XMLSchema#int
law.patent_office law.us_patent type.datetime
Patent office Patent 0
none none argmin
law.patent_office.patents law.us_patent.issue_date
Patents Issue 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 :law.patent_office . 
?x1 :type.object.type :law.us_patent . 
{
SELECT (MIN(?y2) AS ?x2)  WHERE { 
?y0 :type.object.type :law.patent_office . 
?y1 :type.object.type :law.us_patent . 
?y0 :law.patent_office.patents ?y1 . 
?y1 :law.us_patent.issue_date ?y2 . 
FILTER ( ?y0 != ?y1 && ?y0 != ?y2 && ?y1 != ?y2  )
}
}
?x0 :law.patent_office.patents ?x1 . 
?x1 :law.us_patent.issue_date ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(ARGMIN law.patent_office (JOIN law.patent_office.patents law.us_patent.issue_date))