Problem: Gregorian calendar:

Prior to 1917, Turkey used the lunar Islamic calendar with the Hegira era for general purposes and the Julian calendar for fiscal purposes. The start of the fiscal year was eventually fixed at 1 March and the year number was roughly equivalent to the Hegira year (see Rumi calendar). As the solar year is longer than the lunar year this originally entailed the use of "escape years" every so often when the number of the fiscal year would jump. From 1 March 1917 the fiscal year became Gregorian, rather than Julian. On 1 January 1926 the use of the Gregorian calendar was extended to include use for general purposes and the number of the year became the same as in other countries.

Who use the Hegira era is a fiscal calendar?
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A: unanswerable

Problem: Boston:

Tourism also composes a large part of Boston's economy, with 21.2 million domestic and international visitors spending $8.3 billion in 2011; excluding visitors from Canada and Mexico, over 1.4 million international tourists visited Boston in 2014, with those from China and the United Kingdom leading the list. Boston's status as a state capital as well as the regional home of federal agencies has rendered law and government to be another major component of the city's economy. The city is a major seaport along the United States' East Coast and the oldest continuously operated industrial and fishing port in the Western Hemisphere.

How many tourists visited Boston in 2011?
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A: 21.2 million

Problem: Philadelphia:

In 1981, large sections of the SEPTA Regional Rail service to the far suburbs of Philadelphia were discontinued due to lack of funding. Several projects have been proposed to extend rail service back to these areas, but lack of funding has again been the chief obstacle to implementation. These projects include the proposed Schuylkill Valley Metro to Wyomissing, PA, and extension of the Media/Elwyn line back to Wawa, PA. SEPTA's Airport Regional Rail Line Regional Rail offers direct service to the Philadelphia International Airport.

Name a proposed project to repalce it?
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A: Schuylkill Valley Metro to Wyomissing, PA, and extension of the Media/Elwyn line back to Wawa, PA. SEPTA's Airport Regional Rail Line Regional Rail

Problem: Nutrition:

Research in the field of nutrition has greatly contributed in finding out the essential facts about how environmental depletion can lead to crucial nutrition-related health problems like contamination, spread of contagious diseases, malnutrition, etc. Moreover, environmental contamination due to discharge of agricultural as well as industrial chemicals like organocholrines, heavy metal, and radionucleotides may adversely affect the human and the ecosystem as a whole. As far as safety of the human health is concerned, then these environmental contaminants can reduce people's nutritional status and health. This could directly or indirectly cause drastic changes in their diet habits. Hence, food-based remedial as well as preventive strategies are essential to address global issues like hunger and malnutrition and to enable the susceptible people to adapt themselves to all these environmental as well as socio-economic alterations.

Other than industrial chemicals, what other industry discharges chemicals that can contaminate the environment?
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A:
agricultural