September 1966 Commonwealth Prime Ministers' Conference
It was held in the United Kingdom and was hosted by that country's Prime Minister , Harold Wilson . 
<triplet> United Kingdom <subj> Prime Minister <obj> office held by head of government <triplet> Prime Minister <subj> United Kingdom <obj> country <triplet> Harold Wilson <subj> United Kingdom <obj> country of citizenship <subj> Prime Minister <obj> position held