Problem: Roman Republic:

The Roman Republic (Latin: Res publica Romana; Classical Latin: [ˈreːs ˈpuːb.lɪ.ka roːˈmaː.na]) was the period of ancient Roman civilization beginning with the overthrow of the Roman Kingdom, traditionally dated to 509 BC, and ending in 27 BC with the establishment of the Roman Empire. It was during this period that Rome's control expanded from the city's immediate surroundings to hegemony over the entire Mediterranean world. During the first two centuries of its existence, the Roman Republic expanded through a combination of conquest and alliance, from central Italy to the entire Italian peninsula. By the following century, it included North Africa, Spain, and what is now southern France. Two centuries after that, towards the end of the 1st century BC, it included the rest of modern France, Greece, and much of the eastern Mediterranean. By this time, internal tensions led to a series of civil wars, culminating with the assassination of Julius Caesar, which led to the transition from republic to empire. The exact date of transition can be a matter of interpretation. Historians have variously proposed Julius Caesar's crossing of the Rubicon River in 49 BC, Caesar's appointment as dictator for life in 44 BC, and the defeat of Mark Antony and Cleopatra at the Battle of Actium in 31 BC. However, most use the same date as did the ancient Romans themselves, the Roman Senate's grant of extraordinary powers to Octavian and his adopting the title Augustus in 27 BC, as the defining event ending the Republic.

When did the Roman Republic end?
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A: 27 BC


Problem: Chihuahua (state):

During the Napoleonic Occupation of Spain, Miguel Hidalgo y Costilla, a Catholic priest of progressive ideas, declared Mexican independence in the small town of Dolores, Guanajuato on September 16, 1810 with a proclamation known as the "Grito de Dolores". Hidalgo built a large support among intellectuals, liberal priests and many poor people. Hidalgo fought to protect the rights of the poor and indigenous population. He started on a march to the capital, Mexico City, but retreated back north when faced with the elite of the royal forces at the outskirts of the capital. He established a liberal government from Guadalajara, Jalisco but was soon forced to flee north by the royal forces that recaptured the city. Hidalgo attempted to reach the United States and gain American support for Mexican independence. HIdalgo reached Saltillo, Coahuila where he publicly resigned his military post and rejected a pardon offered by Viceroy Francisco Venegas in return for Hidalgo's surrender. A short time later, he and his supporters were captured by royalist Ignacio Elizondo at the Wells of Baján (Norias de Baján) on March 21, 1811 and taken to the city of Chihuahua. Hidalgo forced the Bishop of Valladolid, Manuel Abad y Queipo, to rescind the excommunication order he had circulated against him on September 24, 1810. Later, the Inquisition issued an excommunication edict on October 13, 1810 condemning Miguel Hidalgo as a seditionary, apostate, and heretic.

What was the name of the town in which Miguel Hidalgo y Costilla declared independence?
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A: Dolores


Problem: Capital punishment in the United States:

If a defendant is sentenced to death at the trial level, the case then goes into a direct review. The direct review process is a typical legal appeal. An appellate court examines the record of evidence presented in the trial court and the law that the lower court applied and decides whether the decision was legally sound or not. Direct review of a capital sentencing hearing will result in one of three outcomes. If the appellate court finds that no significant legal errors occurred in the capital sentencing hearing, the appellate court will affirm the judgment, or let the sentence stand. If the appellate court finds that significant legal errors did occur, then it will reverse the judgment, or nullify the sentence and order a new capital sentencing hearing. Lastly, if the appellate court finds that no reasonable juror could find the defendant eligible for the death penalty, a rarity, then it will order the defendant acquitted, or not guilty, of the crime for which he/she was given the death penalty, and order him sentenced to the next most severe punishment for which the offense is eligible. About 60 percent survive the process of direct review intact.

What process begins after a death sentence is handed down at trial?
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A: direct review


Problem: Planck constant:

There are both practical and theoretical difficulties in determining h. The practical difficulties can be illustrated by the fact that the two most accurate methods, the watt balance and the X-ray crystal density method, do not appear to agree with one another. The most likely reason is that the measurement uncertainty for one (or both) of the methods has been estimated too low – it is (or they are) not as precise as is currently believed – but for the time being there is no indication which method is at fault.

Why does this difficulty occur?
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A:
it is (or they are) not as precise as is currently believed