which manufactured drug form's patent is expired on 02/21/2015?
Entity Entity Entity
m.0hqlr9v m.0hqq6wg m.0hqmgts
Baraclude 1 film coated tablet Baraclude 0.5 film coated tablet Baraclude 0.05 solution
class literal
medicine.manufactured_drug_form 2015-02-21^^http://www.w3.org/2001/XMLSchema#date
medicine.manufactured_drug_form type.datetime
Manufactured drug form 02/21/2015
none none
medicine.manufactured_drug_form.patent_expiry_date
Patent expiry 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 { "2015-02-21-08:00"^^<http://www.w3.org/2001/XMLSchema#date> } 
?x0 :medicine.manufactured_drug_form.patent_expiry_date ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND medicine.manufactured_drug_form (JOIN medicine.manufactured_drug_form.patent_expiry_date 2015-02-21^^http://www.w3.org/2001/XMLSchema#date))