Problem: Please answer a question about the following article about Samurai:
The Japanese defenders recognized the possibility of a renewed invasion, and began construction of a great stone barrier around Hakata Bay in 1276. Completed in 1277, this wall stretched for 20 kilometers around the border of the bay. This would later serve as a strong defensive point against the Mongols. The Mongols attempted to settle matters in a diplomatic way from 1275 to 1279, but every envoy sent to Japan was executed. This set the stage for one of the most famous engagements in Japanese history.
How long was the Hakata Bay barrier?
A: 20 kilometers
Problem: Please answer a question about the following article about Solar energy:
In 2000, the United Nations Development Programme, UN Department of Economic and Social Affairs, and World Energy Council published an estimate of the potential solar energy that could be used by humans each year that took into account factors such as insolation, cloud cover, and the land that is usable by humans. The estimate found that solar energy has a global potential of 1,575–49,837 EJ per year (see table below).
What factors were taken into account in the estimate published in 2000 on solar energy?
A: insolation, cloud cover, and the land that is usable by humans
Problem: Please answer a question about the following article about Madrasa:
Al-Azhar University, founded in Cairo, Egypt in 975 by the Ismaʻīlī Shīʻī Fatimid dynasty as a jāmiʻah, had individual faculties for a theological seminary, Islamic law and jurisprudence, Arabic grammar, Islamic astronomy, early Islamic philosophy and logic in Islamic philosophy. The postgraduate doctorate in law was only obtained after "an oral examination to determine the originality of the candidate's theses", and to test the student's "ability to defend them against all objections, in disputations set up for the purpose." ‘Abd al-Laṭīf al-Baghdādī also delivered lectures on Islamic medicine at al-Azhar, while Maimonides delivered lectures on medicine and astronomy there during the time of Saladin. Another early jāmiʻah was the Niẓāmīyah of Baghdād (founded 1091), which has been called the "largest university of the Medieval world." Mustansiriya University, established by the ʻAbbāsid caliph al-Mustanṣir in 1233, in addition to teaching the religious subjects, offered courses dealing with philosophy, mathematics and the natural sciences.
What is Nizamiyah of Baghdad most known for?
A: largest university of the Medieval world
Problem: Please answer a question about the following article about Greeks:
Greek colonies and communities have been historically established on the shores of the Mediterranean Sea and Black Sea, but the Greek people have always been centered around the Aegean and Ionian seas, where the Greek language has been spoken since the Bronze Age. Until the early 20th century, Greeks were distributed between the Greek peninsula, the western coast of Asia Minor, the Black Sea coast, Cappadocia in central Anatolia, Egypt, the Balkans, Cyprus, and Constantinople. Many of these regions coincided to a large extent with the borders of the Byzantine Empire of the late 11th century and the Eastern Mediterranean areas of ancient Greek colonization. The cultural centers of the Greeks have included Athens, Thessalonica, Alexandria, Smyrna, and Constantinople at various periods.
What eleventh century empire had roughly the same extent as ancient Greece's?
A:
Byzantine Empire