jan jansen served as editor on the editor in chief for what journal?
Entity
m.010lyqtq
History in Africa
class class entity entity
book.journal book.editorial_tenure m.010lzgnz m.02wk2cy
book.journal book.editorial_tenure book.periodical_editor book.editor_title
Journal Editorial tenure Jan Jansen Editor in Chief
none none none none
book.periodical.editorial_staff book.editorial_tenure.editor book.editorial_tenure.title
Editorial staff Editor Title
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 :book.journal . 
?x1 :type.object.type :book.editorial_tenure . 
VALUES ?x2 { :m.010lzgnz } 
VALUES ?x3 { :m.02wk2cy } 
?x0 :book.periodical.editorial_staff ?x1 . 
?x1 :book.editorial_tenure.editor ?x2 . 
?x1 :book.editorial_tenure.title ?x3 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND book.journal (JOIN book.periodical.editorial_staff (AND (JOIN book.editorial_tenure.editor m.010lzgnz) (JOIN book.editorial_tenure.title m.02wk2cy))))