Question: When did they put gates on downing street?
qaPairs: question: When did they put barriers on downing street at the St James's Park end of the street?
answer: 11 November 1920
question: When did they put a wooden barricade on downing street at the end of the street?
answer: 26 November 1920
question: When did they put metal barriers on downing street at the end of the street?
answer: 1973
question: When did they put a semi-permanent barrier on downing street between the pavement and carriageway on the Foreign Office side?
answer: 1974
question: When did they put railings and a demountable gate on downing street?
answer: 1982
question: When did they put black steel gates on downing street?
answer: 1989