What is the {Open source hardware} with the {MIN(voltage)} whose {connector} is {USB Micro-B}  ?
Which open source hardware has the lowest voltage with connector of USB Micro-B?
What is the open source hardware with the lowest voltage whose connector is USB Micro-B?
SELECT ?x WHERE { ?x property:connector resource:Micro-USB . . ?x property:voltage ?c . ?x rdf:type ontology:open_source_hardware }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q159172>.

?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/P2436>.
?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/P2935> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q24837468> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q159172 . ?ent wdt:P2436 ?obj . ?ent wdt:P2935 wd:Q24837468. } ORDER BY ASC(?obj)LIMIT 5 