Question: Who won the big brother naija last year?
Disambiguated questions and answers: question: Who won the big brother naija in 2017?
Who won the big brother naija  in 2006?
answer: Efe Ejeba
Michael "Efe" Ejeba
Katung Aduwak
Natural Questions answer: Efe (from the Wikipedia article "Big Brother Naija 2017")