Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
By 16:50, with the Prussian southern attacks in danger of breaking up, the Prussian 3rd Guards Infantry Brigade of the Second Army opened an attack against the French positions at St. Privat which were commanded by General Canrobert. At 17:15, the Prussian 4th Guards Infantry Brigade joined the advance followed at 17:45 by the Prussian 1st Guards Infantry Brigade. All of the Prussian Guard attacks were pinned down by lethal French gunfire from the rifle pits and trenches. At 18:15 the Prussian 2nd Guards Infantry Brigade, the last of the 1st Guards Infantry Division, was committed to the attack on St. Privat while Steinmetz committed the last of the reserves of the First Army across the Mance Ravine. By 18:30, a considerable portion of the VII and VIII Corps disengaged from the fighting and withdrew towards the Prussian positions at Rezonville.
What factor immobilised the Prussian Guard?
A: lethal French gunfire

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Earthworms make a significant contribution to soil fertility. The rear end of the Palolo worm, a marine polychaete that tunnels through coral, detaches in order to spawn at the surface, and the people of Samoa regard these spawning modules as a delicacy. Anglers sometimes find that worms are more effective bait than artificial flies, and worms can be kept for several days in a tin lined with damp moss. Ragworms are commercially important as bait and as food sources for aquaculture, and there have been proposals to farm them in order to reduce over-fishing of their natural populations. Some marine polychaetes' predation on molluscs causes serious losses to fishery and aquaculture operations.
What type of annelid tunnels through coral?
A: Palolo worm

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Geographically, the empire was divided into several provinces, the borders of which changed numerous times during the Umayyad reign. Each province had a governor appointed by the khalifah. The governor was in charge of the religious officials, army leaders, police, and civil administrators in his province. Local expenses were paid for by taxes coming from that province, with the remainder each year being sent to the central government in Damascus. As the central power of the Umayyad rulers waned in the later years of the dynasty, some governors neglected to send the extra tax revenue to Damascus and created great personal fortunes.
What did the borders of the empire do before the Umayyad reign?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
New Delhi is the largest commercial city in northern India. It has an estimated net State Domestic Product (FY 2010) of ₹1595 billion (US$23 billion) in nominal terms and ~₹6800 billion (US$100 billion) in PPP terms. As of 2013, the per capita income of Delhi was Rs. 230000, second highest in India after Goa. GSDP in Delhi at the current prices for 2012-13 is estimated at Rs 3.88 trillion (short scale) against Rs 3.11 trillion (short scale) in 2011-12.
What was the 2011-12 GSDP estimate for Delhi?
A:
Rs 3.11 trillion