Problem: In 2015 Beyoncé signed an open letter which the ONE Campaign had been collecting signatures for; the letter was addressed to Angela Merkel and Nkosazana Dlamini-Zuma, urging them to focus on women as they serve as the head of the G7 in Germany and the AU in South Africa respectively, which will start to set the priorities in development funding before a main UN summit in September 2015 that will establish new development goals for the generation.
Who was the letter addressed to?
The answer is the following: Angela Merkel and Nkosazana Dlamini-Zuma

Problem: In the diffuse-porous woods, the demarcation between rings is not always so clear and in some cases is almost (if not entirely) invisible to the unaided eye. Conversely, when there is a clear demarcation there may not be a noticeable difference in structure within the growth ring.
What kind of wood often has ring divisions that can't even be seen by looking at it?
The answer is the following: diffuse-porous

Problem: Aburish asserts that Nasser was not distressed by his frequent relocations, which broadened his horizons and showed him Egyptian society's class divisions. His own social status was well below the wealthy Egyptian elite, and his discontent with those born into wealth and power grew throughout his lifetime. Nasser spent most of his spare time reading, particularly in 1933 when he lived near the National Library of Egypt. He read the Qur'an, the sayings of Muhammad, the lives of the Sahaba (Muhammad's companions), and the biographies of nationalist leaders Napoleon, Ataturk, Otto von Bismarck, and Garibaldi and the autobiography of Winston Churchill.
What was Nasser's position in Egypt's society?
The answer is the following: well below the wealthy Egyptian elite

Problem: Greece's technology parks with incubator facilities include the Science and Technology Park of Crete (Heraklion), the Thessaloniki Technology Park, the Lavrio Technology Park and the Patras Science Park, the Science and Technology Park of Epirus (Ioannina). Greece has been a member of the European Space Agency (ESA) since 2005. Cooperation between ESA and the Hellenic National Space Committee began in the early 1990s. In 1994 Greece and ESA signed their first cooperation agreement. Having formally applied for full membership in 2003, Greece became the ESA's sixteenth member on 16 March 2005. As member of the ESA, Greece participates in the agency's telecommunication and technology activities, and the Global Monitoring for Environment and Security Initiative.
Greece and ESA signed their first agreement in what year?
The answer is the following:
1994