Context and question: Asphalt/bitumen also occurs in unconsolidated sandstones known as "oil sands" in Alberta, Canada, and the similar "tar sands" in Utah, US. The Canadian province of Alberta has most of the world's reserves of natural bitumen, in three huge deposits covering 142,000 square kilometres (55,000 sq mi), an area larger than England or New York state. These bituminous sands contain 166 billion barrels (26.4×10^9 m3) of commercially established oil reserves, giving Canada the third largest oil reserves in the world. and produce over 2.3 million barrels per day (370×10^3 m3/d) of heavy crude oil and synthetic crude oil. Although historically it was used without refining to pave roads, nearly all of the bitumen is now used as raw material for oil refineries in Canada and the United States.
Where does most of the Canadian oil supply end up?
Answer: unanswerable
Context and question: In 1994, responding to the need for a more useful system for describing chronic pain, the International Association for the Study of Pain (IASP) classified pain according to specific characteristics: (1) region of the body involved (e.g. abdomen, lower limbs), (2) system whose dysfunction may be causing the pain (e.g., nervous, gastrointestinal), (3) duration and pattern of occurrence, (4) intensity and time since onset, and (5) etiology. However, this system has been criticized by Clifford J. Woolf and others as inadequate for guiding research and treatment. Woolf suggests three classes of pain : (1) nociceptive pain, (2) inflammatory pain which is associated with tissue damage and the infiltration of immune cells, and (3) pathological pain which is a disease state caused by damage to the nervous system or by its abnormal function (e.g. fibromyalgia, irritable bowel syndrome, tension type headache, etc.).
What system did Woolf J. Clifford criticize? 
Answer: unanswerable
Context and question: Miami is also considered a "hot spot" for dance music, Freestyle, a style of dance music popular in the 80's and 90's heavily influenced by Electro, hip-hop, and disco. Many popular Freestyle acts such as Pretty Tony, Debbie Deb, Stevie B, and Exposé, originated in Miami. Indie/folk acts Cat Power and Iron & Wine are based in the city, while alternative hip hop artist Sage Francis, electro artist Uffie, and the electroclash duo Avenue D were born in Miami, but musically based elsewhere. Also, ska punk band Against All Authority is from Miami, and rock/metal bands Nonpoint and Marilyn Manson each formed in neighboring Fort Lauderdale. Cuban American female recording artist, Ana Cristina, was born in Miami in 1985.
What genre of music doesn't Uffie perform?
Answer:
unanswerable