Input: Read this: The quarklepton definition of ordinary matter, however, identifies not only the elementary building blocks of matter, but also includes composites made from the constituents (atoms and molecules, for example). Such composites contain an interaction energy that holds the constituents together, and may constitute the bulk of the mass of the composite. As an example, to a great extent, the mass of an atom is simply the sum of the masses of its constituent protons, neutrons and electrons. However, digging deeper, the protons and neutrons are made up of quarks bound together by gluon fields (see dynamics of quantum chromodynamics) and these gluons fields contribute significantly to the mass of hadrons. In other words, most of what composes the "mass" of ordinary matter is due to the binding energy of quarks within protons and neutrons. For example, the sum of the mass of the three quarks in a nucleon is approximately 7001125000000000000♠️12.5 MeV/c2, which is low compared to the mass of a nucleon (approximately 7002938000000000000♠️938 MeV/c2). The bottom line is that most of the mass of everyday objects comes from the interaction energy of its elementary components.
Question: Most of the mass of binding energy is due to what?

Output: unanswerable

Input: Read this: Spanish explorer Alonso de Salazar was the first European to see the islands in 1526, commanding the ship Santa Maria de la Victoria, the only surviving vessel of the Loaisa Expedition. On August 21, he sighted an island (probably Taongi) at 14N that he named "San Bartolome".
Question: Which European first saw the Marshall Islands?

Output: Alonso de Salazar

Input: Read this: Easter was the Sunday after the 15th day of this moon, whose 14th day was allowed to precede the equinox. Where the two systems produced different dates there was generally a compromise so that both churches were able to celebrate on the same day. By the 10th century all churches (except some on the eastern border of the Byzantine Empire) had adopted the Alexandrian Easter, which still placed the vernal equinox on 21 March, although Bede had already noted its drift in 725it had drifted even further by the 16th century.
Question: What did the Alexandrian Easter place on 25 March?

Output: unanswerable

Input: Read this: Northwestern is a large, residential research university. Accredited by the North Central Association of Colleges and Schools and the respective national professional organizations for chemistry, psychology, business, education, journalism, music, engineering, law, and medicine, the university offers 124 undergraduate programs and 145 graduate and professional programs. Northwestern conferred 2,190 bachelor's degrees, 3,272 master's degrees, 565 doctoral degrees, and 444 professional degrees in 20122013.
Question: How many doctoral degrees did Northwestern confer during the 2012-2013 school term?

Output:
565