Question: There are seven suburbicarian sees: Ostia, Albano, Porto and Santa Rufina, Palestrina, Sabina and Mentana, Frascati and Velletri. Velletri was united with Ostia from 1150 until 1914, when Pope Pius X separated them again, but decreed that whatever cardinal bishop became Dean of the College of Cardinals would keep the suburbicarian see he already held, adding to it that of Ostia, with the result that there continued to be only six cardinal bishops.
Is there an answer to this question: How did Pope Pius X maintain only four cardinal bishops?

Answer: unanswerable

Question: Nanjing is an important railway hub in eastern China. It serves as rail junction for the Beijing-Shanghai (Jinghu) (which is itself composed of the old Jinpu and Huning Railways), NanjingTongling Railway (Ningtong), NanjingQidong (Ningqi), and the Nanjing-Xian (Ningxi) which encompasses the HefeiNanjing Railway. Nanjing is connected to the national high-speed railway network by BeijingShanghai High-Speed Railway and ShanghaiWuhanChengdu Passenger Dedicated Line, with several more high-speed rail lines under construction.
Is there an answer to this question: What lines comprise the Beijing-Shanghai (Jinghu) line?

Answer: the old Jinpu and Huning Railways

Question: During the Second Punic War in 218 BC, the Carthaginian general Hannibal probably crossed the Alps with an army numbering 38,000 infantry, 8,000 cavalry, and 37 war elephants. This was one of the most celebrated achievements of any military force in ancient warfare, although no evidence exists of the actual crossing or the place of crossing. The Romans, however, had built roads along the mountain passes, which continued to be used through the medieval period to cross the mountains and Roman road markers can still be found on the mountain passes.
Is there an answer to this question: When was the Second Punic War?

Answer: 218 BC

Question: The D-Day Normandy landings on June 6, 1944, were costly but successful. A month later, the invasion of Southern France took place, and control of forces in the southern invasion passed from the AFHQ to the SHAEF. Many prematurely considered that victory in Europe would come by summer's endhowever the Germans did not capitulate for almost a year. From then until the end of the war in Europe on May 8, 1945, Eisenhower, through SHAEF, commanded all Allied forces, and through his command of ETOUSA had administrative command of all U.S. forces on the Western Front north of the Alps. He was ever mindful of the inevitable loss of life and suffering that would be experienced on an individual level by the troops under his command and their families. This prompted him to make a point of visiting every division involved in the invasion. Eisenhower's sense of responsibility was underscored by his draft of a statement to be issued if the invasion failed. It has been called one of the great speeches of history:
Is there an answer to this question: After what possible event would the speech called one of the greatest in history have been delivered?

Answer:
if the invasion failed