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.

Let me give you an example: 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.
The answer to this example can be: When was the French and Indian War?
Here is 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.

OK. solve this:
Ultimately, Lee spent over two and a half years writing To Kill a Mockingbird. The book was published on July 11, 1960. After rejecting the "Watchman" title, it was initially re-titled Atticus, but Lee renamed it "To Kill a Mockingbird" to reflect that the story went beyond just a character portrait. The editorial team at Lippincott warned Lee that she would probably sell only several thousand copies. In 1964, Lee recalled her hopes for the book when she said, "I never expected any sort of success with 'Mockingbird.' ... I was hoping for a quick and merciful death at the hands of the reviewers but, at the same time, I sort of hoped someone would like it enough to give me encouragement. Public encouragement. I hoped for a little, as I said, but I got rather a whole lot, and in some ways this was just about as frightening as the quick, merciful death I'd expected." Instead of a "quick and merciful death", Reader's Digest Condensed Books chose the book for reprinting in part, which gave it a wide readership immediately. Since the original publication, the book has never been out of print.
Answer:
What date did To Kill a Mockingbird begin to circulate?