Problem: Umayyad Caliphate:

Marwan was succeeded by his son, Abd al-Malik (685–705), 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.

In what year did Ibn al-Zubayr die?
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A: 692


Problem: Montevideo has a very rich architectural heritage and an impressive number of writers, artists, and musicians. Uruguayan tango is a unique form of dance that originated in the neighbourhoods of Montevideo towards the end of the 1800s. Tango, candombe and murga are the three main styles of music in this city. The city is also the centre of the cinema of Uruguay, which includes commercial, documentary and experimental films. There are two movie theatre companies running seven cinemas, around ten independent ones and four art film cinemas in the city. The theatre of Uruguay is admired inside and outside Uruguayan borders. The Solís Theatre is the most prominent theatre in Uruguay and the oldest in South America. There are several notable theatrical companies and thousands of professional actors and amateurs. Montevideo playwrights produce dozens of works each year; of major note are Mauricio Rosencof, Ana Magnabosco and Ricardo Prieto.
Tango, candombe and murga are three main styles of what?
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Answer: music


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Anthocyanins tend to be the main polyphenolics in purple grapes whereas flavan-3-ols (i.e. catechins) are the more abundant phenolic in white varieties. Total phenolic content, a laboratory index of antioxidant strength, is higher in purple varieties due almost entirely to anthocyanin density in purple grape skin compared to absence of anthocyanins in white grape skin. It is these anthocyanins that are attracting the efforts of scientists to define their properties for human health. Phenolic content of grape skin varies with cultivar, soil composition, climate, geographic origin, and cultivation practices or exposure to diseases, such as fungal infections.
What is the laboratory index of antioxidant strength in grapes known as? 
A: Total phenolic content


Context and question: Across London, Black and Asian children outnumber White British children by about six to four in state schools. Altogether at the 2011 census, of London's 1,624,768 population aged 0 to 15, 46.4 per cent were White, 19.8 per cent were Asian, 19 per cent were Black, 10.8 per cent were Mixed and 4 per cent represented another ethnic group. In January 2005, a survey of London's ethnic and religious diversity claimed that there were more than 300 languages spoken in London and more than 50 non-indigenous communities with a population of more than 10,000. Figures from the Office for National Statistics show that, in 2010[update], London's foreign-born population was 2,650,000 (33 per cent), up from 1,630,000 in 1997.
What is the ratio of black and Asian schoolchildren to white schoolchildren?
Answer: about six to four


Question: The use of the phrases as summaries of teaching emerged over time during the Reformation, based on the overarching principle of sola scriptura (by scripture alone). This idea contains the four main doctrines on the Bible: that its teaching is needed for salvation (necessity); that all the doctrine necessary for salvation comes from the Bible alone (sufficiency); that everything taught in the Bible is correct (inerrancy); and that, by the Holy Spirit overcoming sin, believers may read and understand truth from the Bible itself, though understanding is difficult, so the means used to guide individual believers to the true teaching is often mutual discussion within the church (clarity).
Is there an answer to this question: What power can help someone overcome sin?

Answer: the Holy Spirit


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Encoder / decoder overall delay is not defined, which means there is no official provision for gapless playback. However, some encoders such as LAME can attach additional metadata that will allow players that can handle it to deliver seamless playback.
What is an example of an encoder that can attach additional metadeta?
A:
LAME