1998-10 was the date in which what file format was created?
Entity
m.04gnc5
Digital Print Order Format
class literal
computer.file_format 1998-10^^http://www.w3.org/2001/XMLSchema#gYearMonth
computer.file_format type.datetime
File Format 1998-10
none none
computer.file_format.creation_date
Creation 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 :computer.file_format . 
VALUES ?x1 { "1998-10-08:00"^^<http://www.w3.org/2001/XMLSchema#gYearMonth> } 
?x0 :computer.file_format.creation_date ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND computer.file_format (JOIN computer.file_format.creation_date 1998-10^^http://www.w3.org/2001/XMLSchema#gYearMonth))