Does the sentence "In Alexandria in the 19th century there was a large community of Italian Egyptians and Italian was the "lingua franca" of the city." provide a valid answer to the question "What is official language of Egypt?" OPTIONS:
- yes
- no

A: no

Does the sentence "On 27 November at the Korean eastern front, a U.S. 7th Infantry Division Regimental Combat Team (3,000 soldiers) and the U.S. 1st Marine Division (12,00015,000 marines) were unprepared for the PVA 9th Army Group's three-pronged encirclement tactics at the Battle of Chosin Reservoir, but they managed to escape under Air Force and X Corps support firealbeit with some 15,000 collective casualties." provide a valid answer to the question "What tactics of the PVA were US and ROK troops not prepared to handle?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Young also worked to improve Detroit's transportation system, but tension between Young and his suburban counterparts over regional matters was problematic throughout his mayoral term." provide a valid answer to the question "Who was the first black mayor of Detroit?" OPTIONS:
- yes
- no

A: no

Does the sentence "Some reordering of the Thuringian states occurred during the German Mediatisation from 1795 to 1814, and the territory was included within the Napoleonic Confederation of the Rhine organized in 1806." provide a valid answer to the question "Who led the unification of Germany in 1871?" OPTIONS:
- yes
- no

A:
no