I want to know the answer to the following question:
On what date did the German army declare Paris as an open city?
All the background I'm provided with is that "On 16–17 July 1942, following German orders, the French police and gendarmes arrested 12,884 Jews, including 4,115 children, and confined them during five days at the Vel d'Hiv (Vélodrome d'Hiver), from which they were transported by train to the extermination camp at Auschwitz.". Is that enough to answer the question?