Question: when did they start building the louvre pyramid
Answer: 1989-04-01; 04-01-1989; 01-04-1989; 1989 April 01; 1989 April, 01; 04 01 1989; 01 April 1989; 04/01/1989; 01/04/1989; 1989-04-01; 01 04 1989; 1989 04 01