Problem: Portugal:

As a result of the change in its status and the arrival of the Portuguese royal family, Brazilian administrative, civic, economical, military, educational, and scientific apparatus were expanded and highly modernized. Portuguese and their allied British troops fought against the French Invasion of Portugal and by 1815 the situation in Europe had cooled down sufficiently that Joao VI would have been able to return safely to Lisbon. However, the King of Portugal remained in Brazil until the Liberal Revolution of 1820, which started in Porto, demanded his return to Lisbon in 1821.

Until when did the King of Portugal remain in Brazil?
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A: until the Liberal Revolution of 1820

Problem: Capital punishment in the United States:

In May 2014, Oklahoma Director of Corrections, Robert Patton, recommended an indefinite hold on executions in the state after the botched execution of African-American Clayton Lockett. The prisoner had to be tasered to restrain him prior to the execution, and the lethal injection missed a vein in his groin, resulting in Lockett regaining consciousness, trying to get up, and to speak, before dying of a heart attack 43 minutes later, after the attempted execution had been called off. In 2015, the state approved nitrogen asphyxiation as a method of execution.

What state employed Robert Patton in May 2014?
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A: Oklahoma

Problem: Hellenistic period:

Carthage was a Phoenician colony on the coast of Tunisia. Carthaginian culture came into contact with the Greeks through Punic colonies in Sicily and through their widespread Mediterranean trade network. While the Carthaginians retained their Punic culture and language, they did adopt some Hellenistic ways, one of the most prominent of which was their military practices. In 550 BCE, Mago I of Carthage began a series of military reforms which included copying the army of Timoleon, Tyrant of Syracuse. The core of Carthage's military was the Greek-style phalanx formed by citizen hoplite spearmen who had been conscripted into service, though their armies also included large numbers of mercenaries. After their defeat in the first Punic war, Carthage hired a Spartan mercenary captain, Xanthippus of Carthage to reform their military forces. Xanthippus reformed the Carthaginian military along Macedonian army lines.

What Spartan mercenary helped reform Carthage's military?
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A: Xanthippus of Carthage

Problem: John, King of England:

John was deeply suspicious of the barons, particularly those with sufficient power and wealth to potentially challenge the king. Numerous barons were subjected to John's malevolentia, even including William Marshal, a famous knight and baron normally held up as a model of utter loyalty. The most infamous case, which went beyond anything considered acceptable at the time, proved to be that of William de Braose, a powerful marcher lord with lands in Ireland. De Braose was subjected to punitive demands for money, and when he refused to pay a huge sum of 40,000 marks (equivalent to 26,666 at the time),[nb 13] his wife and one of his sons were imprisoned by John, which resulted in their deaths. De Braose died in exile in 1211, and his grandsons remained in prison until 1218. John's suspicions and jealousies meant that he rarely enjoyed good relationships with even the leading loyalist barons.

John was deeply suspicious of who?
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A:
the barons