Input: Read this: The first emperor of the Ming dynasty, Zhu Yuanzhang (the Hongwu Emperor), who overthrew the Yuan dynasty, renamed the city Yingtian, rebuilt it, and made it the dynastic capital in 1368. He constructed a 48 km (30 mi) long city wall around Yingtian, as well as a new Ming Palace complex, and government halls. It took 200,000 laborers 21 years to finish the project. The present-day City Wall of Nanjing was mainly built during that time and today it remains in good condition and has been well preserved. It is among the longest surviving city walls in China. The Jianwen Emperor ruled from 1398 to 1402.
Question: How long did it take to finish the wall?

Output: 21 years

Input: Read this: Charleston has one official sister city, Spoleto, Umbria, Italy. The relationship between the two cities began when Pulitzer Prize-winning Italian composer Gian Carlo Menotti selected Charleston as the city to host the American version of Spoleto's annual Festival of Two Worlds. "Looking for a city that would provide the charm of Spoleto, as well as its wealth of theaters, churches, and other performance spaces, they selected Charleston, South Carolina, as the ideal location. The historic city provided a perfect fit: intimate enough that the Festival would captivate the entire city, yet cosmopolitan enough to provide an enthusiastic audience and robust infrastructure."
Question: What is the profession of Gian Carlo Menotti?

Output: composer

Input: Read this: Currents induced into this winding provide the rotor magnetic field. The shape of the rotor bars determines the speed-torque characteristics. At low speeds, the current induced in the squirrel cage is nearly at line frequency and tends to be in the outer parts of the rotor cage. As the motor accelerates, the slip frequency becomes lower, and more current is in the interior of the winding. By shaping the bars to change the resistance of the winding portions in the interior and outer parts of the cage, effectively a variable resistance is inserted in the rotor circuit. However, the majority of such motors have uniform bars.
Question: Where can variable resistance not be created?

Output: unanswerable

Input: Read this: The Northern Russian dialects and those spoken along the Volga River typically pronounce unstressed /o/ clearly (the phenomenon called okanye/). Besides the absence of vowel reduction, some dialects have high or diphthongal /e~i/ in the place of Proto-Slavic *e and /o~u/ in stressed closed syllables (as in Ukrainian) instead of Standard Russian /e/ and /o/. An interesting morphological feature is a post-posed definite article -to, -ta, -te similarly to that existing in Bulgarian and Macedonian.
Question: What do some Russian dialects do about vowels?

Output:
absence of vowel reduction