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]: None of the early appearances of the 'Happy Birthday to You' lyrics included credits or copyright notices. The Summy Company registered a copyright in 1935, crediting authors Preston Ware Orem and Mrs. R. R. Forman. In 1988, Warner / Chappell Music purchased the company owning the copyright for US $25 million, with the value of 'Happy Birthday' estimated at US $5 million. Based on the 1935 copyright registration, Warner claimed that the United States copyright will not expire until 2030, and that unauthorized public performances of the song are illegal unless royalties are paid to Warner. In one specific instance in February 2010, these royalties were said to amount to US $700. By one estimate, the song is the highest-earning single song in history, with estimated earnings since its creation of US $50 million. In the European Union, the copyright for the song expired on January 1, 2017.
[A]: who owns the copyright to the happy birthday song

[Q]: Passover commences on the 15th of the Hebrew month of Nisan and lasts for either seven days (in Israel and for Reform Jews and other progressive Jews around the world who adhere to the Biblical commandment) or eight days for Orthodox, Hasidic, and most Conservative Jews (in the diaspora). In Judaism, a day commences at dusk and lasts until the following dusk, thus the first day of Passover begins after dusk of the 14th of Nisan and ends at dusk of the 15th day of the month of Nisan. The rituals unique to the Passover celebrations commence with the Passover Seder when the 15th of Nisan has begun. In the Northern Hemisphere Passover takes place in spring as the Torah prescribes it: 'in the month of (the) spring' ( Exodus 23: 15). It is one of the most widely celebrated Jewish holidays.
[A]: when is passover and how long is it

[Q]: The National League of Families POW / MIA flag, also known as the POW / MIA flag, consists of a silhouette of a prisoner of war (POW) before a guard tower and barbed wire in white on a black field. 'POW / MIA' appears above the silhouette and the words 'You Are Not Forgotten' appear below in white on the black field.
[A]:
what does the message at the bottom of the pow mia flag mean