Problem: University of Notre Dame:

In 2015-2016, Notre Dame ranked 18th overall among "national universities" in the United States in U.S. News & World Report's Best Colleges 2016. In 2014, USA Today ranked Notre Dame 10th overall for American universities based on data from College Factual. Forbes.com's America's Best Colleges ranks Notre Dame 13th among colleges in the United States in 2015, 8th among Research Universities, and 1st in the Midwest. U.S. News & World Report also lists Notre Dame Law School as 22nd overall. BusinessWeek ranks Mendoza College of Business undergraduate school as 1st overall. It ranks the MBA program as 20th overall. The Philosophical Gourmet Report ranks Notre Dame's graduate philosophy program as 15th nationally, while ARCHITECT Magazine ranked the undergraduate architecture program as 12th nationally. Additionally, the study abroad program ranks sixth in highest participation percentage in the nation, with 57.6% of students choosing to study abroad in 17 countries. According to payscale.com, undergraduate alumni of University of Notre Dame have a mid-career median salary $110,000, making it the 24th highest among colleges and universities in the United States. The median starting salary of $55,300 ranked 58th in the same peer group.

Forbes.com placed Notre Dame at what position compared to other US research universities?
---
A: 8th

Problem: Mammals include the largest animals on the planet, the rorquals and other large whales, as well as some of the most intelligent, such as elephants, primates, including humans, and cetaceans. The basic body type is a four-legged land-borne animal, but some mammals are adapted for life at sea, in the air, in trees, or on two legs. The largest group of mammals, the placentals, have a placenta, which enables feeding the fetus during gestation. Mammals range in size from the 3040 mm (1.21.6 in) bumblebee bat to the 33-meter (108 ft) blue whale.
What does a placenta help bumblebee bats do?
---
Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Philadelphia's central city was created in the 17th century following the plan by William Penn's surveyor Thomas Holme. Center City is structured with long straight streets running east-west and north-south forming a grid pattern. The original city plan was designed to allow for easy travel and to keep residences separated by open space that would help prevent the spread of fire. The Delaware River and Schuylkill Rivers served as early boundaries between which the city's early street plan was kept within. In addition, Penn planned the creation of five public parks in the city which were renamed in 1824 (in parenthesis): Centre Square, North East Publick Square (Franklin Square), Northwest Square (Logan Square), Southwest Square (Rittenhouse Square), and Southeast Square (Washington Square). Center City has grown into the second-most populated downtown area in the United States, after Midtown Manhattan in New York City, with an estimated 183,240 residents in 2015.
How many live in the central area today?
A: 183,240

Context and question: The final has never been contested by two teams from outside the top division and there have only been eight winners who weren't in the top flight: Notts County (1894); Tottenham Hotspur (1901); Wolverhampton Wanderers (1908); Barnsley (1912); West Bromwich Albion (1931); Sunderland (1973), Southampton (1976) and West Ham United (1980). With the exception of Tottenham, these clubs were all playing in the second tier (the old Second Division) - Tottenham were playing in the Southern League and were only elected to the Football League in 1908, meaning they are the only non-league winners of the FA Cup. Other than Tottenham's victory, only 24 finalists have come from outside English football's top tier, with a record of 7 wins and 17 runners-up: and none at all from the third tier or lower, Southampton (1902) being the last finalist from outside the top two tiers.
How many finalists have come from inside English football's top tier?
Answer: unanswerable

Question: In its early years Universal released three brands of feature films Red Feather, low-budget programmers; Bluebird, more ambitious productions; and Jewel, their prestige motion pictures. Directors included Jack Conway, John Ford, Rex Ingram, Robert Z. Leonard, George Marshall and Lois Weber, one of the few women directing films in Hollywood.:13
Is there an answer to this question: What type of movies came out of Bluebird?

Answer: more ambitious productions

Problem: Umayyad Caliphate:

Marwan was succeeded by his son, Abd al-Malik (685705), who reconsolidated Umayyad control of the caliphate. The early reign of Abd al-Malik was marked by the revolt of Al-Mukhtar, which was based in Kufa. Al-Mukhtar hoped to elevate Muhammad ibn al-Hanafiyyah, another son of Ali, to the caliphate, although Ibn al-Hanafiyyah himself may have had no connection to the revolt. The troops of al-Mukhtar engaged in battles both with the Umayyads in 686, defeating them at the river Khazir near Mosul, and with Ibn al-Zubayr in 687, at which time the revolt of al-Mukhtar was crushed. In 691, Umayyad troops reconquered Iraq, and in 692 the same army captured Mecca. Ibn al-Zubayr was killed in the attack.

Who was the father of Muhammad ibn al-Hanafiyyah?
---
A:
Ali