Input: Article: The migration-period peoples who later coalesced into a "German" ethnicity were the Germanic tribes of the Saxons, Franci, Thuringii, Alamanni and Bavarii. These five tribes, sometimes with inclusion of the Frisians, are considered as the major groups to take part in the formation of the Germans. The varieties of the German language are still divided up into these groups. Linguists distinguish low Saxon, Franconian, Bavarian, Thuringian and Alemannic varieties in modern German. By the 9th century, the large tribes which lived on the territory of modern Germany had been united under the rule of the Frankish king Charlemagne, known in German as Karl der Groe. Much of what is now Eastern Germany became Slavonic-speaking (Sorbs and Veleti), after these areas were vacated by Germanic tribes (Vandals, Lombards, Burgundians and Suebi amongst others) which had migrated into the former areas of the Roman Empire.

Now answer this question: What 6th tribe is sometimes included with the original 5 German tribes?

Output: Frisians

Article: In the instance when the Presidency and both Houses of Congress are controlled by one party, the Speaker normally assumes a lower profile and defers to the President. For that situation the House Minority Leader can play the role of a de facto "leader of the opposition", often more so than the Senate Minority Leader, due to the more partisan nature of the House and the greater role of leadership. Minority Leaders who have played prominent roles in opposing the incumbent President have included Gerald Ford, Richard Gephardt, Nancy Pelosi, and John Boehner.

Question: What minority leaders have played prominenct roles to opposing incumbent president?
Ans: Gerald Ford, Richard Gephardt, Nancy Pelosi, and John Boehner

Here is a question about this article: Sony have since launched their budget range of PlayStation 3 titles, known as the Greatest Hits range in North America, the Platinum range in Europe and Australia and The Best range in Japan. Among the titles available in the budget range include Resistance: Fall of Man, MotorStorm, Uncharted: Drakes Fortune, Rainbow Six: Vegas, Call Of Duty 3, Assassin's Creed and Ninja Gaiden Sigma. As of October 2009 Metal Gear Solid 4: Guns of the Patriots, Ratchet & Clank Future: Tools of Destruction, Devil May Cry 4, Army of Two, Battlefield: Bad Company and Midnight Club: Los Angeles have also joined the list.
What is the answer to this question: In what year was Devil May Cry 4 added to the budget game offerings for PS3?
****
So... 2009

The problem: Answer a question about this article:
Most common glass contains other ingredients to change its properties. Lead glass or flint glass is more 'brilliant' because the increased refractive index causes noticeably more specular reflection and increased optical dispersion. Adding barium also increases the refractive index. Thorium oxide gives glass a high refractive index and low dispersion and was formerly used in producing high-quality lenses, but due to its radioactivity has been replaced by lanthanum oxide in modern eyeglasses.[citation needed] Iron can be incorporated into glass to absorb infrared energy, for example in heat absorbing filters for movie projectors, while cerium(IV) oxide can be used for glass that absorbs UV wavelengths.
What is the benefit of thorium oxide in addition to its refractive index?
****
The answer: low dispersion

Problem: Please answer a question about the following article about Ashkenazi Jews:
They established communities throughout Central and Eastern Europe, which had been their primary region of concentration and residence until recent times, evolving their own distinctive characteristics and diasporic identities. In the late Middle Ages the center of gravity of the Ashkenazi population, and its traditional cultural life, shifted steadily eastward, out of the German lands into Poland and Lithuania (including present-day Belarus and Ukraine). In the course of the late 18th and 19th centuries, those Jews who remained in or returned to the German lands experienced a cultural reorientation; under the influence of the Haskalah and the struggle for emancipation, as well the intellectual and cultural ferment in urban centers, they gradually abandoned the use of Yiddish, while developing new forms of Jewish religious life and cultural identity.
In the late 18th and 19th centuries, Jews who returned to German lands experienced what?
A: a cultural reorientation

Question: Read this and answer the question

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 science fiction?
Answer:
since the 19th century