Problem: Portugal:

The most important demographic influence in the modern Portuguese seems to be the oldest one; current interpretation of Y-chromosome and mtDNA data suggests that the Portuguese have their origin in Paleolithic peoples that began arriving to the European continent around 45,000 years ago. All subsequent migrations did leave an impact, genetically and culturally, but the main population source of the Portuguese is still Paleolithic. Genetic studies show Portuguese populations not to be significantly different from other European populations.

What is the main population source of the Portuguese people?
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A: Paleolithic


Problem: A party's floor leader, in conjunction with other party leaders, plays an influential role in the formulation of party policy and programs. He is instrumental in guiding legislation favored by his party through the House, or in resisting those programs of the other party that are considered undesirable by his own party. He is instrumental in devising and implementing his party's strategy on the floor with respect to promoting or opposing legislation. He is kept constantly informed as to the status of legislative business and as to the sentiment of his party respecting particular legislation under consideration. Such information is derived in part from the floor leader's contacts with his party's members serving on House committees, and with the members of the party's whip organization.
Who plays an influential role in the formation of party policy?
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Answer: A party's floor leader


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Standing out in Clarke's (and Newton's) response to Leibniz's arguments is the bucket argument: Water in a bucket, hung from a rope and set to spin, will start with a flat surface. As the water begins to spin in the bucket, the surface of the water will become concave. If the bucket is stopped, the water will continue to spin, and while the spin continues, the surface will remain concave. The concave surface is apparently not the result of the interaction of the bucket and the water, since the surface is flat when the bucket first starts to spin, it becomes concave as the water starts to spin, and it remains concave as the bucket stops.
What becomes flat when the bucket stops spinning?
A: unanswerable


Context and question: The city's elevation is 2,643 ft (806 m) above sea level (as measured at the Tucson International Airport). Tucson is situated on an alluvial plain in the Sonoran desert, surrounded by five minor ranges of mountains: the Santa Catalina Mountains and the Tortolita Mountains to the north, the Santa Rita Mountains to the south, the Rincon Mountains to the east, and the Tucson Mountains to the west. The high point of the Santa Catalina Mountains is 9,157 ft (2,791 m) Mount Lemmon, the southernmost ski destination in the continental U.S., while the Tucson Mountains include 4,687 ft (1,429 m) Wasson Peak. The highest point in the area is Mount Wrightson, found in the Santa Rita Mountains at 9,453 ft (2,881 m) above sea level.
How high is Tucson's airport?
Answer: 2,643 ft (806 m) above sea level


Question: The first ground attack came at the Battle of Umm Qasr on 21 March 2003 when a combined force of British, American and Polish forces seized control of the port city of Umm Qasr. Baghdad, Iraq's capital city, fell to American forces in April 2003 and Saddam Hussein's government quickly dissolved. On 1 May 2003, Bush announced that major combat operations in Iraq had ended. However, an insurgency arose against the U.S.-led coalition and the newly developing Iraqi military and post-Saddam government. The insurgency, which included al-Qaeda affiliated groups, led to far more coalition casualties than the invasion. Other elements of the insurgency were led by fugitive members of President Hussein's Ba'ath regime, which included Iraqi nationalists and pan-Arabists. Many insurgency leaders are Islamists and claim to be fighting a religious war to reestablish the Islamic Caliphate of centuries past. Iraq's former president, Saddam Hussein was captured by U.S. forces in December 2003. He was executed in 2006.
Is there an answer to this question: When did American forces fall?

Answer: unanswerable


Problem: Somerset:

Bridgwater was developed during the Industrial Revolution as the area's leading port. The River Parrett was navigable by large ships as far as Bridgwater. Cargoes were then loaded onto smaller boats at Langport Quay, next to the Bridgwater Bridge, to be carried further up river to Langport; or they could turn off at Burrowbridge and then travel via the River Tone to Taunton. The Parrett is now only navigable as far as Dunball Wharf. Bridgwater, in the 19th and 20th centuries, was a centre for the manufacture of bricks and clay roof tiles, and later cellophane, but those industries have now stopped. With its good links to the motorway system, Bridgwater has developed as a distribution hub for companies such as Argos, Toolstation, Morrisons and Gerber Juice. AgustaWestland manufactures helicopters in Yeovil, and Normalair Garratt, builder of aircraft oxygen systems, is also based in the town. Many towns have encouraged small-scale light industries, such as Crewkerne's Ariel Motor Company, one of the UK's smallest car manufacturers.

What is the leading port of somerset 
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A:
Bridgwater was developed during the Industrial Revolution as the area's leading port