Text: Clobetasol propionate /klobetsl/ is a corticosteroid of the glucocorticoid class used to treat various skin disorders including eczema and psoriasis. It is also highly effective for contact dermatitis caused by exposure to poison ivy/oak. Clobetasol belongs to US Class I (Europe: class IV) of the corticosteroids, making it one of the most potent available. It comes in shampoo, mousse, ointment and emollient cream presentations. It has very high potency and typically should not be used with occlusive dressings, or for extended continuous use (beyond two weeks). It is also used to treat several autoimmune diseases including alopecia areata, lichen sclerosus, and lichen planus.

Question: can you use clobetasol propionate on poison ivy?
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Answer: yes

Text: Hurricane John, also known as Typhoon John, was both the longest-lasting and the farthest-traveling tropical cyclone ever observed. John formed during the 1994 Pacific hurricane season, which had above-average activity due to the El Nino of 1994--95, and peaked as a Category 5 hurricane on the Saffir--Simpson hurricane wind scale, the highest categorization for hurricanes.

Question: has there ever been a hurricane named john?
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Answer: yes

Text: In the early 10th century the Anglo-Saxon kingdoms, united by thelstan (r. 927--939), became part of the North Sea Empire of Cnut the Great, a personal union between England, Denmark and Norway. The Norman conquest of England in 1066 led to the transfer of the English capital city and chief royal residence from the Anglo-Saxon one at Winchester to Westminster, and the City of London quickly established itself as England's largest and principal commercial centre.

Question: has the capital of england always been london?
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Answer: no

Text: Mayflies (also known as Canadian soldiers in the United States, and as shadflies or fishflies in Canada and the upper Midwestern U.S.; also up-winged flies in the United Kingdom) are aquatic insects belonging to the order Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 families.

Question: are mayflies and fish flies the same thing?
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Answer:
yes