instruction:
This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
question:
The city remained in the hands of Christian troops until 1102, when the Almoravids retook the city and restored the Muslim religion. Although the self-styled 'Emperor of All Spain', Alfonso VI of Leon and Castile, drove them from the city, he was not strong enough to hold it. The Christians set it afire before abandoning it, and the Almoravid Masdali took possession on 5 May 1109. The event was commemorated in a poem by Ibn Khafaja in which he thanked Yusuf ibn Tashfin for the city's liberation.The declining power of the Almoravids coincided with the rise of a new dynasty in North Africa, the Almohads, who seized control of the peninsula from the year 1145, although their entry into Valencia was deterred by Ibn Mardanis, King of Valencia and Murcia until 1171, at which time the city finally fell to the North Africans. The two Muslim dynasties would rule Valencia for more than a century.
answer:
In what year did Christian troops lose control of Valencia?

question:
Hokkien /hkin/ (traditional Chinese: ; simplified Chinese: ; pinyin: Fujianhua; Peh-oe-ji: Hok-kian oe) or Quanzhang (QuanzhouZhangzhou / ChinchewChangchew; BP: ZuanziuZiangziu) is a group of mutually intelligible Min Nan Chinese dialects spoken throughout Southeast Asia, Taiwan, and by many other overseas Chinese. Hokkien originated from a dialect in southern Fujian. It is closely related to the Teochew, though mutual comprehension is difficult, and is somewhat more distantly related to Hainanese. Besides Hokkien, there are also other Min and Hakka dialects in Fujian province, most of which are not mutually intelligible with Hokkien.
answer:
Where did Hokkien originate?

question:
In the film Knute Rockne, All American, Knute Rockne (played by Pat O'Brien) delivers the famous "Win one for the Gipper" speech, at which point the background music swells with the "Notre Dame Victory March". George Gipp was played by Ronald Reagan, whose nickname "The Gipper" was derived from this role. This scene was parodied in the movie Airplane! with the same background music, only this time honoring George Zipp, one of Ted Striker's former comrades. The song also was prominent in the movie Rudy, with Sean Astin as Daniel "Rudy" Ruettiger, who harbored dreams of playing football at the University of Notre Dame despite significant obstacles.
answer:
Ronald Reagan had a nickname, what was it?