TASK DEFINITION: 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.
PROBLEM: In 1969 at a UNESCO Conference in San Francisco, peace activist John McConnell proposed a day to honor the Earth and the concept of peace, to first be celebrated on March 21, 1970, the first day of spring in the northern hemisphere. This day of nature's equipoise was later sanctioned in a proclamation written by McConnell and signed by Secretary General U Thant at the United Nations. A month later a separate Earth Day was founded by United States Senator Gaylord Nelson as an environmental teach-in first held on April 22, 1970. Nelson was later awarded the Presidential Medal of Freedom award in recognition of his work. While this April 22 Earth Day was focused on the United States, an organization launched by Denis Hayes, who was the original national coordinator in 1970, took it international in 1990 and organized events in 141 nations.

SOLUTION: what was the purpose of the first earth day event on april 22nd 1970

PROBLEM: 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.

SOLUTION: who owns the copyright to the happy birthday song

PROBLEM: The 2000s saw Murphy with roles in Don't Say a Word (2001) alongside Michael Douglas, and alongside Eminem in 8 Mile (2002), for which she gained critical recognition. Her later roles included Riding in Cars with Boys (2001), Spun (2002), Uptown Girls (2003), Sin City (2005), and Happy Feet (2006). Murphy also voiced Luanne Platter on the animated television series King of the Hill (1997 -- 2009). Her final film, Something Wicked, was released in April 2014.

SOLUTION:
who voiced luanne from king of the hill