what is the name of the category that contains the engines designed in the project of design of the rolls-royce pegasus?
Entity
m.0q03_
Turbofan
class class entity
engineering.engine_category engineering.engine m.05g_y_8
engineering.engine_category engineering.engine projects.project
Engine category Engine Design of the Rolls-Royce Pegasus
none none none
engineering.engine_category.engines projects.project_focus.projects
Engines Projects
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 :engineering.engine_category . 
?x1 :type.object.type :engineering.engine . 
VALUES ?x2 { :m.05g_y_8 } 
?x0 :engineering.engine_category.engines ?x1 . 
?x1 :projects.project_focus.projects ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND engineering.engine_category (JOIN engineering.engine_category.engines (JOIN projects.project_focus.projects m.05g_y_8)))