Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The term Appalachian refers to several different regions associated with the mountain range. Most broadly, it refers to the entire mountain range with its surrounding hills and the dissected plateau region. The term is often used more restrictively to refer to regions in the central and southern Appalachian Mountains, usually including areas in the states of Kentucky, Tennessee, Virginia, Maryland, West Virginia, and North Carolina, as well as sometimes extending as far south as northern Alabama, Georgia and western South Carolina, and as far north as Pennsylvania, southern Ohio and parts of southern upstate New York.
What states comprise of the southern Appalachian mountains?
A: Kentucky, Tennessee, Virginia, Maryland, West Virginia, and North Carolina

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Centre For Co-Curricular Studies provides elective subjects and language courses outside the field of science for students in the other faculties and departments. Students are encouraged to take these classes either for credit or in their own time, and in some departments this is mandatory. Courses exist in a wide range of topics including philosophy, ethics in science and technology, history, modern literature and drama, art in the 20th century, film studies. Language courses are available in French, German, Japanese, Italian, Russian, Spanish, Arabic and Mandarin Chinese. The Centre For Co-Curricular Studies is home to the Science Communication Unit which offers master's degrees in Science Communication and Science Media Production for science graduates.
What are all students required to do on their own time?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Up to February 28 in the calendar you are converting from add one day less or subtract one day more than the calculated value. Remember to give February the appropriate number of days for the calendar you are converting into. When you are subtracting days to move from Julian to Gregorian be careful, when calculating the Gregorian equivalent of February 29 (Julian), to remember that February 29 is discounted. Thus if the calculated value is -4 the Gregorian equivalent of this date is February 24.
If you need a date of four days less, what do you subtract from the Julian calendar?
A: -4

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Copper has been used since ancient times as a durable, corrosion resistant, and weatherproof architectural material. Roofs, flashings, rain gutters, downspouts, domes, spires, vaults, and doors have been made from copper for hundreds or thousands of years. Copper's architectural use has been expanded in modern times to include interior and exterior wall cladding, building expansion joints, radio frequency shielding, and antimicrobial indoor products, such as attractive handrails, bathroom fixtures, and counter tops. Some of copper's other important benefits as an architectural material include its low thermal movement, light weight, lightning protection, and its recyclability.
How long has copper been used in building construction?
A:
hundreds or thousands of years