What is the {autocannon} with the {MIN(caliber)} whose {country of origin} is {Soviet Union}  ?
What gun has the smallest caliber in the Soviet Union?
select ?ent where { ?ent wdt:P31 wd:Q751705 . ?ent wdt:P4403 ?obj . ?ent wdt:P495 wd:Q15180} ORDER BY ASC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q751705>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4403>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P495> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q15180> .

}
ORDER BY ASC(?obj1)
LIMIT 5
In the Soviet Union, what gun has the smallest caliber?