Context:
Maskarade ("Masquerade") is an opera in three acts by Carl Nielsen to a Danish libretto by Vilhelm Andersen, based on the comedy by Ludvig Holberg. It was first performed on 11 November 1906 at Det Kongelige Teater, Copenhagen. "Maskarade" has enjoyed enduring popularity in Denmark where it is considered to be the country's national opera.
Hypothesis: Maskarade debuted around the turn of the 20th century.
Yes
Context:
ISLAMABAD, Pakistan (CNN) -- Taliban militants made their deepest incursion into Pakistan this week, seizing control of areas that are a short drive from the capital city.  A Pakistani government official said the militants fully withdrew from the Buner district on Friday, although other officials cast doubt on the extent of the pullout and how long it would last. Buner is only 60 miles outside Islamabad. The situation is particularly concerning because Pakistan is a nuclear-armed state. The Islamic republic is believed to have between 30 and 40 nuclear warheads, according to the U.N. nuclear watchdog, the International Atomic Energy Agency (IAEA).
Hypothesis: The Taliban was founded over 35 years ago.
It's impossible to say
Context:
Somerset v Stewart (1772) 98 ER 499 (aka "Somersett's case", or in State Trials v.XX "Sommersett v Steuart") is a famous judgment of the English Court of King's Bench in 1772, which held that chattel slavery was unsupported by the common law in England and Wales, although the position elsewhere in the British Empire was left ambiguous. Lord Mansfield decided that:
Hypothesis: British Empire was ruled by a King in 1772

Yes