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]: The word ain't is a contraction for am not, is not, are not, has not, and have not in the common English language vernacular. In some dialects ain't is also used as a contraction of do not, does not, and did not. The development of ain't for the various forms of to be not, to have not, and to do not occurred independently, at different times. The usage of ain't for the forms of to be not was established by the mid-18th century, and for the forms of to have not by the early 19th century.
[A]: what is the meaning of ain't in english


[Q]: In biological taxonomy, a domain (Latin: regio), also superkingdom or empire, is the highest taxonomic rank of organisms in the three-domain system of taxonomy designed by Carl Woese, an American microbiologist and biophysicist. According to the Woese system, introduced in 1990, the tree of life consists of three domains: Archaea, Bacteria, and Eukarya. The first two are all prokaryotic microorganisms, or single-celled organisms whose cells have no nucleus. All life that has a nucleus and membrane-bound organelles, and multicellular organisms, is included in the Eukarya. Stefan Luketa in 2012 proposed a five 'dominion' system, adding two more to the above.
[A]: why are organisms placed into the domain of eukarya


[Q]: In the United States, any musical works published before 1922, in addition to those voluntarily placed in public domain, exist in the public domain. In most other countries, music generally enters the public domain in a period of fifty to seventy-five years after the composer's death. (Public domain rights must be verified for each individual country.) It is important to note the distinction between 'musical works' (sheet music and other compositions) and 'sound recordings' (audio files, CDs, records), as virtually all sound recordings will not fall into public domain until 2067, unless explicitly placed into the public domain by its creators, rights holders or made by an employee or officer of the United States government acting under their official duty. (The status of copyright on sound recordings in the United States from before such copyrights were nationalized 1972 is nebulous; the copyrights were prior to that were considered a state issue, and even if no state law provided for it, some courts established an extra-legal common law copyright, the exact nature of which has been inconsistently applied over the years.)
[A]:
how old does a song have to be to become public domain


