In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Q: Not all nation states have codified constitutions, though all such states have a jus commune, or law of the land, that may consist of a variety of imperative and consensual rules. These may include customary law, conventions, statutory law, judge-made law, or international rules and norms. Constitutional law deals with the fundamental principles by which the government exercises its authority. In some instances, these principles grant specific powers to the government, such as the power to tax and spend for the welfare of the population. Other times, constitutional principles act to place limits on what the government can do, such as prohibiting the arrest of an individual without sufficient cause.

A: what is the difference between common law statutory law and constitutional law
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Q: Public holidays in the United States are largely controlled by private sector employers, who employ approximately 62% of the total U.S. population who are given paid time off. A typical work week is generally 40 hours a week with a Saturday-Sunday weekend. Public holidays with paid time off is generally defined to occur on a day that is within the employee's work week. When a holiday occurs on Saturday or Sunday, that holiday is shifted to either Friday or Monday. Most employers follow a holiday schedule similar to the federal holidays of the United States, with exceptions or additions. The federal holiday schedule mainly benefits employees of government and government regulated businesses. However, this sector only comprises 15% of the working population. At the discretion of the employer, other non-federal holidays such as Christmas Eve and the Day after Thanksgiving are common additions to the list of paid holidays while Columbus Day and Veterans Day are common omissions. Besides paid holidays are festival and food holidays that also have wide acceptance based on sales of goods and services that are typically associated with that holiday. Halloween and Valentine's Day are such examples of widely celebrated uncompensated holidays.

A: how many bank holidays are there in the us
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Q: The Battle of Vimy Ridge was a military engagement fought primarily as part of the Battle of Arras, in the Nord-Pas-de-Calais region of France, during the First World War. The main combatants were the Canadian Corps, of four divisions, against three divisions of the German Sixth Army. The battle, which took place from 9 to 12 April 1917, was part of the opening phase of the British-led Battle of Arras, a diversionary attack for the French Nivelle Offensive.

A:
when did the battle of vimy ridge start
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