on the date of mar. the 31st, 2011, which manufactured drug was removed from the market?
Entity Entity Entity Entity
m.0hqjg0w m.0hqqjr4 m.0hqjr9j m.0hqkkj6
Gabapentin 800 film coated tablet Buspar 10 tablet DesOwen 0.5 ointment Benprox 27.5 gel
class literal
medicine.manufactured_drug_form 2011-03-31^^http://www.w3.org/2001/XMLSchema#date
medicine.manufactured_drug_form type.datetime
Manufactured drug form Mar. the 31st, 2011
none none
medicine.manufactured_drug_form.marketing_end_date
Marketing end 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 :medicine.manufactured_drug_form . 
VALUES ?x1 { "2011-03-31-08:00"^^<http://www.w3.org/2001/XMLSchema#date> } 
?x0 :medicine.manufactured_drug_form.marketing_end_date ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND medicine.manufactured_drug_form (JOIN medicine.manufactured_drug_form.marketing_end_date 2011-03-31^^http://www.w3.org/2001/XMLSchema#date))