Problem: Please answer a question about the following article about Philadelphia:
Philadelphia has dedicated landmarks to its sister cities. Dedicated in June 1976, the Sister Cities Plaza, a site of 0.5 acres (2,000 m2) located at 18th and Benjamin Franklin Parkway, honors Philadelphia's relationships with Tel Aviv and Florence which were its first sister cities. Another landmark, the Torun Triangle, honoring the sister city relationship with Torun, Poland, was constructed in 1976, west of the United Way building at 18th Street and the Benjamin Franklin Parkway. In addition, the Triangle contains the Copernicus monument. Renovations were made to Sister Cities Park in mid-2011 and on May 10, 2012, SCP was reopened and currently features an interactive fountain honoring Philadelphia's ten sister and friendship cities, a cafe and visitor's center, children's play area, outdoor garden, and boat pond, as well as pavilion built to environmentally friendly standards.
What city in Poland is a sister city to Philadelphia?
A: Torun
Problem: Please answer a question about the following article about Light-emitting diode:
In the late 1980s, key breakthroughs in GaN epitaxial growth and p-type doping ushered in the modern era of GaN-based optoelectronic devices. Building upon this foundation, Dr. Moustakas at Boston University patented a method for producing high-brightness blue LEDs using a new two-step process. Two years later, in 1993, high-brightness blue LEDs were demonstrated again by Shuji Nakamura of Nichia Corporation using a gallium nitride growth process similar to Dr. Moustakas's. Both Dr. Moustakas and Mr. Nakamura were issued separate patents, which confused the issue of who was the original inventor (partly because although Dr. Moustakas invented his first, Dr. Nakamura filed first).[citation needed] This new development revolutionized LED lighting, making high-power blue light sources practical, leading to the development of technologies like BlueRay, as well as allowing the bright high resolution screens of modern tablets and phones.[citation needed]
Who first invented a method to produce high-brightness blue LEDs?
A: Dr. Moustakas
Problem: Please answer a question about the following article about Qing dynasty:
The most significant fact of early and mid-Qing social history was population growth. The population doubled during the 18th century. People in this period were also remarkably on the move. There is evidence suggesting that the empire's rapidly expanding population was geographically mobile on a scale, which, in term of its volume and its protracted and routinized nature, was unprecedented in Chinese history. Indeed, the Qing government did far more to encourage mobility than to discourage it. Migration took several different forms, though might be divided in two varieties: permanent migration for resettlement, and relocation conceived by the party (in theory at least) as a temporary sojourn. Parties to the latter would include the empire's increasingly large and mobile manual workforce, as well as its densely overlapping internal diaspora of local-origin-based merchant groups. It would also included the patterned movement of Qing subjects overseas, largely to Southeastern Asia, in search of trade and other economic opportunities.
What happened in early and middle Qing history?
A: population growth
Problem: Please answer a question about the following article about Iran:
The prolonged Byzantine-Sassanid Wars, most importantly the climactic Byzantine-Sassanid War of 602-628, as well as the social conflict within the Sassanid Empire, opened the way for an Arab invasion to Iran in the 7th century. Initially defeated by the Arab Rashidun Caliphate, Iran came under the rule of the Arab caliphates of Umayyad and Abbasid. The prolonged and gradual process of the Islamization of Iran began following the conquest. Under the new Arab elite of the Rashidun and later the Umayyad caliphates, both converted (mawali) and non-converted (dhimmi) Iranians were discriminated against, being excluded from the government and military, and having to pay a special tax called Jizya. Gunde Shapur, home of the Academy of Gunde Shapur which was the most important medical center of the world at the time, survived after the invasion, but became known as an Islamic institute thereafter.
What academy was the most important medical center of the world at the time and became Islamicized after the Arab invasions?
A:
Academy of Gunde Shapur