on 1987, what software was initially released?
Entity Entity Entity Entity Entity Entity Entity
m.01rp8m m.095j9 m.03trtg m.03wc8d5 m.0142qs m.04sn4 m.09jk6f
ProE SCUMM ESET NOD32 Online Bible Adobe Illustrator MINIX Mathomatic
class literal
computer.software 1987^^http://www.w3.org/2001/XMLSchema#gYear
computer.software type.datetime
Software 1987
none none
computer.software.first_released
First Released
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.software . 
VALUES ?x1 { "1987-08:00"^^<http://www.w3.org/2001/XMLSchema#gYear> } 
?x0 :computer.software.first_released ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND computer.software (JOIN computer.software.first_released 1987^^http://www.w3.org/2001/XMLSchema#gYear))