what are the names of the general elections that have the turnout of at most 50.0?
Entity Entity Entity Entity
m.0125xk18 m.0660k4n m.065y63g m.02r01nb
European Parliament election, 2014 (North West England) European Parliament election, 2014 (United Kingdom) European Parliament election, 2014 Scottish Parliament election, 2011
class literal
government.general_election 50.0^^http://www.w3.org/2001/XMLSchema#float
government.general_election type.float
General election 50.0
none <=
government.general_election.turnout
Turnout
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.general_election . 
FILTER (?x1 <= "50.0"^^<http://www.w3.org/2001/XMLSchema#float>)
?x0 :government.general_election.turnout ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND government.general_election (le government.general_election.turnout 50.0^^http://www.w3.org/2001/XMLSchema#float))