Here is a question about this article: Estonia's land border with Latvia runs 267 kilometers; the Russian border runs 290 kilometers. From 1920 to 1945, Estonia's border with Russia, set by the 1920 Tartu Peace Treaty, extended beyond the Narva River in the northeast and beyond the town of Pechory (Petseri) in the southeast. This territory, amounting to some 2,300 square kilometres (888 sq mi), was incorporated into Russia by Stalin at the end of World War II. For this reason the borders between Estonia and Russia are still not defined.
What is the answer to this question: What document established the border between Russia and Estonia?
****
So... the 1920 Tartu Peace Treaty

The problem: Answer a question about this article:
In The New Yorker music critic Jody Rosen described Beyonce as "the most important and compelling popular musician of the twenty-first century..... the result, the logical end point, of a century-plus of pop." When The Guardian named her Artist of the Decade, Llewyn-Smith wrote, "Why Beyonce? [...] Because she made not one but two of the decade's greatest singles, with Crazy in Love and Single Ladies (Put a Ring on It), not to mention her hits with Destiny's Child; and this was the decade when singles particularly R&B singles regained their status as pop's favourite medium. [...] [She] and not any superannuated rock star was arguably the greatest live performer of the past 10 years." In 2013, Beyonce made the Time 100 list, Baz Luhrmann writing "no one has that voice, no one moves the way she moves, no one can hold an audience the way she does... When Beyonce does an album, when Beyonce sings a song, when Beyonce does anything, it's an event, and it's broadly influential. Right now, she is the heir-apparent diva of the USA the reigning national voice." In 2014, Beyonce was listed again on the Time 100 and also featured on the cover of the issue.
Which publication named Beyonce the Artist of the Decade?
****
The answer: The Guardian

Problem: Please answer a question about the following article about Antenna (radio):
Gain is a parameter which measures the degree of directivity of the antenna's radiation pattern. A high-gain antenna will radiate most of its power in a particular direction, while a low-gain antenna will radiate over a wider angle. The antenna gain, or power gain of an antenna is defined as the ratio of the intensity (power per unit surface area) radiated by the antenna in the direction of its maximum output, at an arbitrary distance, divided by the intensity radiated at the same distance by a hypothetical isotropic antenna which radiates equal power in all directions. This dimensionless ratio is usually expressed logarithmically in decibels, these units are called "decibels-isotropic" (dBi)
What is an acknowledgement of the range of possible direction for and antenna?
A: gain

Question: Read this and answer the question

The photoelectric effect is the emission of electrons (called "photoelectrons") from a surface when light is shone on it. It was first observed by Alexandre Edmond Becquerel in 1839, although credit is usually reserved for Heinrich Hertz, who published the first thorough investigation in 1887. Another particularly thorough investigation was published by Philipp Lenard in 1902. Einstein's 1905 paper discussing the effect in terms of light quanta would earn him the Nobel Prize in 1921, when his predictions had been confirmed by the experimental work of Robert Andrews Millikan. The Nobel committee awarded the prize for his work on the photo-electric effect, rather than relativity, both because of a bias against purely theoretical physics not grounded in discovery or experiment, and dissent amongst its members as to the actual proof that relativity was real.

Who first observed the photoelectric effect?
Answer: Alexandre Edmond Becquerel

Problem: In 1981 a team of researchers from the Maison de l'Orient et de la Mediterranee, including Jacques Cauvin and Oliver Aurenche divided Near East neolithic chronology into ten periods (0 to 9) based on social, economic and cultural characteristics. In 2002 Danielle Stordeur and Frederic Abbes advanced this system with a division into five periods. Natufian (1) between 12,000 and 10,200 BC, Khiamian (2) between 10,200-8,800 BC, PPNA: Sultanian (Jericho), Mureybetian, early PPNB (PPNB ancien) (3) between 8,800-7,600 BC, middle PPNB (PPNB moyen) 7,600-6,900 BC, late PPNB (PPNB recent) (4) between 7,500 and 7,000 BC and a PPNB (sometimes called PPNC) transitional stage (PPNB final) (5) where Halaf and dark faced burnished ware begin to emerge between 6,900-6,400 BC. They also advanced the idea of a transitional stage between the PPNA and PPNB between 8,800 and 8,600 BC at sites like Jerf el Ahmar and Tell Aswad.
What are the names of two researchers who divided neolithic chronology into ten periods?
The answer is the following: Jacques Cauvin and Oliver Aurenche

Input: Article: Samba Schools are large, social entities with thousands of members and a theme for their song and parade each year. In Rio Carnival, samba schoolsparade in the Sambadrome ("sambodromo" in Portuguese). Some of the most famous include GRES Estacao Primeira de Mangueira, GRES Portela, GRES Imperatriz Leopoldinense, GRES Beija-Flor de Nilopolis, GRES Mocidade Independente de Padre Miguel, and recently, Unidos da Tijuca and GRES Uniao da Ilha do Governador. Local tourists pay $500950, depending on the costume, to buy a Samba costume and dance in the parade. Blocos are small informal groups with a definite theme in their samba, usually satirizing the political situation. About 30 schools in Rio gather hundreds of thousands of participants. More than 440 blocos operate in Rio. Bandas are samba musical bands, also called "street carnival bands", usually formed within a single neighborhood or musical back-ground. The Carnival industry chain amassed in 2012 almost US$1 billion in revenues.

Now answer this question: How much money in US dollars did the Carnival industry make in 2012?

Output:
1 billion