To Kill a Mockingbird has been a source of significant controversy since its being the subject of classroom study as early as 1963. The book's racial slurs, profanity, and frank discussion of rape have led people to challenge its appropriateness in libraries and classrooms across the United States. The American Library Association reported that To Kill a Mockingbird was number 21 of the 100 most frequently challenged books of 2000–2009.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): According to The American Library Association, what rank did the book have among the most frequently challenged books from 2000 to 2009?
Ah, so.. 21

Most MIs occur due to coronary artery disease. Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol intake, among others. The mechanism of an MI often involves the complete blockage of a coronary artery caused by a rupture of an atherosclerotic plaque. MIs are less commonly caused by coronary artery spasms, which may be due to cocaine, significant emotional stress, and extreme cold, among others. A number of tests are useful to help with diagnosis, including electrocardiograms (ECGs), blood tests, and coronary angiography. An ECG may confirm an ST elevation MI if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does a coronary angiography look for?
Ah, so.. unanswerable

Mercury has been smelted from cinnabar for thousands of years. Mercury dissolves many metals, such as gold, silver, and tin, to form amalgams (an alloy in a soft paste, or liquid form at ambient temperature). Amalgams have been used since 200 BC in China for plating objects with precious metals, called gilding, such as armor and mirrors. The ancient Romans often used mercury-tin amalgams for gilding their armor. The amalgam was applied as a paste and then heated until the mercury vaporized, leaving the gold, silver, or tin behind. Mercury was often used in mining, to extract precious metals like gold and silver from their ores.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What have been used since 200 A.D. in China?
Ah, so..
unanswerable