You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Passage: The French and Indian War (1754–1763) was the North American theater of the worldwide Seven Years' War. The war was fought between the colonies of British America and New France, with both sides supported by military units from their parent countries of Great Britain and France, as well as Native American allies. At the start of the war, the French North American colonies had a population of roughly 60,000 European settlers, compared with 2 million in the British North American colonies. The outnumbered French particularly depended on the Indians. Long in conflict, the metropole nations declared war on each other in 1756, escalating the war from a regional affair into an intercontinental conflict.
Solution: When was the French and Indian War?
Why? This question is based on the following sentence in the passage- The French and Indian War (1754–1763) was the North American theater of the worldwide Seven Years' War. It is a common convention to write (start year-end year) beside a historical event to understand when the event happened. You can ask questions like this one about dates, years, other numerals, persons, locations, noun phrases, verb phrases, adjectives, clauses etc. which exist in the paragraph.

New input: Carnival (see other spellings and names) is a Christian festive season that occurs before the Christian season of Lent. The main events typically occur during February or early March, during the period historically known as Shrovetide (or Pre-Lent). Carnival typically involves a public celebration and/or parade combining some elements of a circus, masks and public street party. People wear masks and costumes during many such celebrations, allowing them to lose their everyday individuality and experience a heightened sense of social unity. Excessive consumption of alcohol, meat, and other foods proscribed during Lent is extremely common. Other common features of carnival include mock battles such as food fights; social satire and mockery of authorities; the grotesque body displaying exaggerated features especially large noses, bellies, mouths, and phalli or elements of animal bodies; abusive language and degrading acts; depictions of disease and gleeful death; and a general reversal of everyday rules and norms. 
Solution:
What's the name of the Christian festive season that occurs before the season of Lent?