question:
The King imposed rationing at the palace, much to the dismay of his guests and household.
Who persuaded the king to lock the wine cellars during WWI?

answer: no

question:
The last days of the Qing Dynasty were marked by civil unrest and foreign invasions.
What were the last days of the Qing dynasty marked by?

answer: yes

question:
But as efficiency of electricity generation (and thus of electric traction) improved, by about 1965 electric railways became more efficient than diesel.
What year could be marked as year when electric railways more efficient than diesel ones?

answer: yes

question:
In 1919, following the Treaty of Versailles, the city was restituted to France in accordance with U.S. President Woodrow Wilson's "Fourteen Points" without a referendum.
What year was it restituted to France?

answer:
yes