Input: Read this: At the time of uploading a video, YouTube users are shown a message asking them not to violate copyright laws. Despite this advice, there are still many unauthorized clips of copyrighted material on YouTube. YouTube does not view videos before they are posted online, and it is left to copyright holders to issue a DMCA takedown notice pursuant to the terms of the Online Copyright Infringement Liability Limitation Act. Three successful complaints for copyright infringement against a user account will result in the account and all of its uploaded videos being deleted.
Question: What does the message when uploading a video ask the user not to do?

Output: violate copyright laws

QUES: By the end of the month, the Peloponnese was in open revolt against the Ottomans and by October 1821 the Greeks under Theodoros Kolokotronis had captured Tripolitsa. The Peloponnesian revolt was quickly followed by revolts in Crete, Macedonia and Central Greece, which would soon be suppressed. Meanwhile, the makeshift Greek navy was achieving success against the Ottoman navy in the Aegean Sea and prevented Ottoman reinforcements from arriving by sea. In 1822 and 1824 the Turks and Egyptians ravaged the islands, including Chios and Psara, committing wholesale massacres of the population. This had the effect of galvanizing public opinion in western Europe in favor of the Greek rebels.[page needed]

In what year did the Greeks take Tripolitsa?
What is the answer?
ANS: 1821

QUES: Double fertilization refers to a process in which two sperm cells fertilize cells in the ovary. This process begins when a pollen grain adheres to the stigma of the pistil (female reproductive structure), germinates, and grows a long pollen tube. While this pollen tube is growing, a haploid generative cell travels down the tube behind the tube nucleus. The generative cell divides by mitosis to produce two haploid (n) sperm cells. As the pollen tube grows, it makes its way from the stigma, down the style and into the ovary. Here the pollen tube reaches the micropyle of the ovule and digests its way into one of the synergids, releasing its contents (which include the sperm cells). The synergid that the cells were released into degenerates and one sperm makes its way to fertilize the egg cell, producing a diploid (2n) zygote. The second sperm cell fuses with both central cell nuclei, producing a triploid (3n) cell. As the zygote develops into an embryo, the triploid cell develops into the endosperm, which serves as the embryo's food supply. The ovary now will develop into fruit and the ovule will develop into seed.
When a pollen tube fertilizes cells in the ovary, what is it called?

ANS: unanswerable

London is one of the major classical and popular music capitals of the world and is home to major music corporations, such as EMI and Warner Music Group as well as countless bands, musicians and industry professionals. The city is also home to many orchestras and concert halls, such as the Barbican Arts Centre (principal base of the London Symphony Orchestra and the London Symphony Chorus), Cadogan Hall (Royal Philharmonic Orchestra) and the Royal Albert Hall (The Proms). London's two main opera houses are the Royal Opera House and the London Coliseum. The UK's largest pipe organ is at the Royal Albert Hall. Other significant instruments are at the cathedrals and major churches. Several conservatoires are within the city: Royal Academy of Music, Royal College of Music, Guildhall School of Music and Drama and Trinity Laban.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What are the names of London's two primary opera houses?
Ah, so.. the Royal Opera House and the London Coliseum

Question: To the southwest, the principality of Halych had developed trade relations with its Polish, Hungarian and Lithuanian neighbours and emerged as the local successor to Kievan Rus'. In 1199, Prince Roman Mstislavich united the two previously separate principalities. In 1202 he conquered Kiev, and assumed the title of Grand Duke of Kievan Rus', which was held by the rulers of Vladimir-Suzdal since 1169. His son, Prince Daniil (r. 12381264) looked for support from the West. He accepted a crown as a "Rex Rusiae" ("King of Russia") from the Roman papacy, apparently doing so without breaking with Constantinople. In 1370, the patriarch of the Eastern Orthodox Church in Constantinople granted the King of Poland a metropolitan for his Russian subjects. Lithuanian rulers also requested and received a metropolitan for Novagrudok shortly afterwards. Cyprian, a candidate pushed by the Lithuanian rulers, became Metropolitan of Kiev in 1375 and metropolitan of Moscow in 1382; this way the church in the Russian countries was reunited for some time. In 1439, Kiev became the seat of a separate "Metropolitan of Kiev, Galich and all Rus'" for all Greek Orthodox Christians under Polish-Lithuanian rule.
Try to answer this question if possible: Which neighbors did Halych not develop trade relations with?
Answer: unanswerable

Problem: In general relativity, a vanishing stress-energy tensor implies, through Einstein field equations, the vanishing of all the components of the Ricci tensor. Vacuum does not mean that the curvature of space-time is necessarily flat: the gravitational field can still produce curvature in a vacuum in the form of tidal forces and gravitational waves (technically, these phenomena are the components of the Weyl tensor). The black hole (with zero electric charge) is an elegant example of a region completely "filled" with vacuum, but still showing a strong curvature.
Who's equations helped to imply vanishing of the Ricci tensor?
---
Answer:
Einstein