Problem: Please answer a question about the following article about Modern history:
In China, urbanization increased as the population grew and as the division of labor grew more complex. Large urban centers, such as Nanjing and Beijing, also contributed to the growth of private industry. In particular, small-scale industries grew up, often specializing in paper, silk, cotton, and porcelain goods. For the most part, however, relatively small urban centers with markets proliferated around the country. Town markets mainly traded food, with some necessary manufactures such as pins or oil. Despite the xenophobia and intellectual introspection characteristic of the increasingly popular new school of neo-Confucianism, China under the early Ming dynasty was not isolated. Foreign trade and other contacts with the outside world, particularly Japan, increased considerably. Chinese merchants explored all of the Indian Ocean, reaching East Africa with the treasure voyages of Zheng He.
During The Early MIng Dynasty Chinese merchants explored all of what?
A: Indian Ocean


Question: Read this and answer the question

Before A.D. 200, residents were building earthwork mounds, which were used for ceremonial and religious purposes. Succeeding peoples, including those of the ancient Mississippian culture established by A.D. 1000 in the Piedmont, continued to build or add onto such mounds. In the 500–700 years preceding European contact, the Mississippian culture built large, complex cities and maintained far-flung regional trading networks. Historically documented tribes in the North Carolina region included the Carolina Algonquian-speaking tribes of the coastal areas, such as the Chowanoke, Roanoke, Pamlico, Machapunga, Coree, Cape Fear Indians, and others, who were the first to encounter the English; Iroquoian-speaking Meherrin, Cherokee and Tuscarora of the interior; and Southeastern Siouan tribes, such as the Cheraw, Waxhaw, Saponi, Waccamaw, and Catawba.[citation needed]

By 1000 AD, what culture of people settled in the Piedmont?
Answer: ancient Mississippian culture


Problem: Despite conflicts with the rival monarchic Chetnik movement, Tito's Partisans succeeded in liberating territory, notably the "Republic of Užice". During this period, Tito held talks with Chetnik leader Draža Mihailović on 19 September and 27 October 1941. It is said that Tito ordered his forces to assist escaping Jews, and that more than 2,000 Jews fought directly for Tito.
Which group did Tito order his forces to assist?
The answer is the following: escaping Jews,


The World Bank has sponsored a project to curb air pollution through public transport improvements and the Mexican government has started shutting down polluting factories. They have phased out diesel buses and mandated new emission controls on new cars; since 1993 all new cars must be fitted with a catalytic converter, which reduces the emissions released. Trucks must use only liquefied petroleum gas (LPG). Also construction of an underground rail system was begun in 1968 in order to help curb air pollution problems and alleviate traffic congestion. Today it has over 201 km (125 mi) of track and carries over 5 million people every day. Fees are kept low to encourage use of the system and during rush hours the crush is so great, that authorities have reserved a special carriage specifically for women. Due to these initiatives and others, the air quality in Mexico City has begun to improve, with the air becoming cleaner since 1991, when the air quality was declared to be a public health risk for 355 days of the year.[citation needed]
What is one way the government helps with the "Crush" of the rush hour riding of the subway system?
reserved a special carriage specifically for women


Input: Gramophone record
Delicate sounds and fine overtones were mostly lost, because it took a lot of sound energy to vibrate the recording horn diaphragm and cutting mechanism. There were acoustic limitations due to mechanical resonances in both the recording and playback system. Some pictures of acoustic recording sessions show horns wrapped with tape to help mute these resonances. Even an acoustic recording played back electrically on modern equipment sounds like it was recorded through a horn, notwithstanding a reduction in distortion because of the modern playback. Toward the end of the acoustic era, there were many fine examples of recordings made with horns.

What were issues facing play back and recording mechanics?
Output: acoustic limitations


Problem: Please answer a question about the following article about Race (human categorization):
There is a wide consensus that the racial categories that are common in everyday usage are socially constructed, and that racial groups cannot be biologically defined. Nonetheless, some scholars argue that racial categories obviously correlate with biological traits (e.g. phenotype) to some degree, and that certain genetic markers have varying frequencies among human populations, some of which correspond more or less to traditional racial groupings. For this reason, there is no current consensus about whether racial categories can be considered to have significance for understanding human genetic variation.
Some genetic markers have varying frequencies among what populations?
A:
human