What is the position held by Winnie Madikizela-Mandela at 26th South African Parliament?
SELECT ?obj WHERE { wd:Q239062 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P2937 wd:Q18109299 }
winnie madikizela-mandela: Q239062 26th south african parliament: Q18109299