Problem: Houston:

In August 2005, Houston became a shelter to more than 150,000 people from New Orleans who evacuated from Hurricane Katrina. One month later, approximately 2.5 million Houston area residents evacuated when Hurricane Rita approached the Gulf Coast, leaving little damage to the Houston area. This was the largest urban evacuation in the history of the United States. In September 2008, Houston was hit by Hurricane Ike. As many as forty percent refused to leave Galveston Island because they feared the traffic problems that happened after Hurricane Rita.

How many people stayed in Houston after Hurricane Katrina?
---
A: unanswerable


Problem: Idealism:

Christian theologians have held idealist views, often based on Neoplatonism, despite the influence of Aristotelian scholasticism from the 12th century onward. Later western theistic idealism such as that of Hermann Lotze offers a theory of the "world ground" in which all things find their unity: it has been widely accepted by Protestant theologians. Several modern religious movements, for example the organizations within the New Thought Movement and the Unity Church, may be said to have a particularly idealist orientation. The theology of Christian Science includes a form of idealism: it teaches that all that truly exists is God and God's ideas; that the world as it appears to the senses is a distortion of the underlying spiritual reality, a distortion that may be corrected (both conceptually and in terms of human experience) through a reorientation (spiritualization) of thought.

In what philosophy was Christian idealism often rooted?
---
A: Neoplatonism


Problem: FC Barcelona:

In 1978, Josep Lluís Núñez became the first elected president of FC Barcelona, and, since then, the members of Barcelona have elected the club president. The process of electing a president of FC Barcelona was closely tied to Spain's transition to democracy in 1974 and the end of Franco's dictatorship. The new president's main objective was to develop Barcelona into a world-class club by giving it stability both on and off the pitch. His presidency was to last for 22 years, and it deeply affected the image of Barcelona, as Núñez held to a strict policy regarding wages and discipline, letting go of such players as Maradona, Romário and Ronaldo rather than meeting their demands.

When was Nunez elected as president of FC Barcelona?
---
A: 1978


Problem: Time:

Time travel is the concept of moving backwards or forwards to different points in time, in a manner analogous to moving through space, and different from the normal "flow" of time to an earthbound observer. In this view, all points in time (including future times) "persist" in some way. Time travel has been a plot device in fiction since the 19th century. Traveling backwards in time has never been verified, presents many theoretic problems, and may be an impossibility. Any technological device, whether fictional or hypothetical, that is used to achieve time travel is known as a time machine.

How long has time travel been a topic in theory?
---
A:
unanswerable