In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 40963072 pixels. In June 2015, support for 8K resolution was added, with the videos playing at 76804320 pixels.
What did youtube change its screen format to from 4:3?
widescreen 16:9

Input: Buddhism
In Theravada Buddhism, the ultimate goal is the attainment of the sublime state of Nirvana, achieved by practicing the Noble Eightfold Path (also known as the Middle Way), thus escaping what is seen as a cycle of suffering and rebirth. Mahayana Buddhism instead aspires to Buddhahood via the bodhisattva path, a state wherein one remains in this cycle to help other beings reach awakening. Tibetan Buddhism aspires to Buddhahood or rainbow body.

In what buddhism is the goal a state of nirvana?
Output: Theravada

Input: Article: While the Big Bang model is well established in cosmology, it is likely to be refined in the future. Little is known about the earliest moments of the universe's history. The PenroseHawking singularity theorems require the existence of a singularity at the beginning of cosmic time. However, these theorems assume that general relativity is correct, but general relativity must break down before the universe reaches the Planck temperature, and a correct treatment of quantum gravity may avoid the singularity.

Now answer this question: These theorems have to assume what theory is correct?

Output: general relativity

Article: London was instrumental in the development of punk music, with figures such as the Sex Pistols, The Clash, and Vivienne Westwood all based in the city. More recent artists to emerge from the London music scene include George Michael, Kate Bush, Seal, Siouxsie and the Banshees, Bush, the Spice Girls, Jamiroquai, Blur, The Prodigy, Gorillaz, Mumford & Sons, Coldplay, Amy Winehouse, Adele, Ed Sheeran and One Direction. London is also a centre for urban music. In particular the genres UK garage, drum and bass, dubstep and grime evolved in the city from the foreign genres of hip hop and reggae, alongside local drum and bass. Black music station BBC Radio 1Xtra was set up to support the rise of home-grown urban music both in London and in the rest of the UK.

Question: Which BBC radio station focuses primarily on black and urban music?
Ans: BBC Radio 1Xtra

Here is a question about this article: The existence of discrete inheritable units was first suggested by Gregor Mendel (18221884). From 1857 to 1864, he studied inheritance patterns in 8000 common edible pea plants, tracking distinct traits from parent to offspring. He described these mathematically as 2n combinations where n is the number of differing characteristics in the original peas. Although he did not use the term gene, he explained his results in terms of discrete inherited units that give rise to observable physical characteristics. This description prefigured the distinction between genotype (the genetic material of an organism) and phenotype (the visible traits of that organism). Mendel was also the first to demonstrate independent assortment, the distinction between dominant and recessive traits, the distinction between a heterozygote and homozygote, and the phenomenon of discontinuous inheritance.
What is the answer to this question: Who first suggested the existence of discrete inheritable units?
****
So... Gregor Mendel (18221884)

Article: Coats of arms were very important to the Polish nobility. Its heraldic system evolved together with its neighbours in Central Europe, while differing in many ways from the heraldry of other European countries. Polish knighthood families had its counterparts, links or roots in Moravia (i.e. Poraj) and Germany (i.e. Junosza).

Question: Where did polish knightshood originate?
Ans:
Moravia (i.e. Poraj) and Germany