which rail gauge has the smallest width of no less than 1520.0?
Entity
m.04f74r_
5 ft and 1520 mm gauge railways
class literal
rail.rail_gauge 1520.0^^http://www.w3.org/2001/XMLSchema#float
rail.rail_gauge type.float
Rail gauge 1520.0
none >=
rail.rail_gauge.minimum_width
Minimum width
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 :rail.rail_gauge . 
FILTER (?x1 >= "1520.0"^^<http://www.w3.org/2001/XMLSchema#float>)
?x0 :rail.rail_gauge.minimum_width ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND rail.rail_gauge (ge rail.rail_gauge.minimum_width 1520.0^^http://www.w3.org/2001/XMLSchema#float))