name the focus of the project that includes design and construction of the cornwall railway viaducts?
Entity
m.0b7_b4
Cornwall Railway
class class entity
projects.project_focus projects.project m.05h00br
projects.project_focus projects.project projects.project
Project focus Project Design and Construction of the Cornwall Railway viaducts
none none none
projects.project_focus.projects projects.project.includes_smaller_projects
Projects Includes smaller 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 :projects.project_focus . 
?x1 :type.object.type :projects.project . 
VALUES ?x2 { :m.05h00br } 
?x0 :projects.project_focus.projects ?x1 . 
?x1 :projects.project.includes_smaller_projects ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND projects.project_focus (JOIN projects.project_focus.projects (JOIN projects.project.includes_smaller_projects m.05h00br)))