what family of computers is compatible with the beta disk interface?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.050yz6m m.050yxdm m.028522 m.02qdgk m.0fnw64 m.03c1zsq m.050yx1n m.050yxf2 m.050yxks m.050yxkz m.050yxl4
ZX Spectrum + ZX Spectrum 16K Timex Sinclair 2068 Timex Sinclair 2048 Timex Computer 2048 Inves Spectrum 48k plus ZX Spectrum 48K ZX Spectrum 128 ZX Spectrum +3 ZX Spectrum +2 ZX Spectrum +2A
class class entity
computer.computer computer.computer m.02z9dtf
computer.computer computer.computer computer.computer_peripheral
Computer Computer Beta Disk Interface
none none none
computer.computer.parent_model computer.computer_peripheral.compatible_computers
Parent Model Compatible computers
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.computer . 
?x1 :type.object.type :computer.computer . 
VALUES ?x2 { :m.02z9dtf } 
?x0 :computer.computer.parent_model ?x1 . 
?x2 :computer.computer_peripheral.compatible_computers ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND computer.computer (JOIN computer.computer.parent_model (JOIN (R computer.computer_peripheral.compatible_computers) m.02z9dtf)))