Q: Does "Because it is a complex, subjective phenomenon, defining pain has been a challenge." provide a valid answer to "Why has defining pain been a challenge?"?
A: yes

Q: Does "Her debut single, "Crazy in Love" was named VH1's "Greatest Song of the 2000s", NME's "Best Track of the 00s" and "Pop Song of the Century", considered by Rolling Stone to be one of the 500 greatest songs of all time, earned two Grammy Awards and is one of the best-selling singles of all time at around 8 million copies." provide a valid answer to "VH1 declared what song the "Greatest song of the 2000s?""?
A: yes

Q: Does "The campaign, which aired on February 28, was set to her new music." provide a valid answer to "On June 1 , 2013 where was the concert held for "a Chime for Change"?"?
A: no

Q: Does "On July 20, 2015, within five days of West's announcement as the headlining artist of the closing ceremonies of the 2015 Pan American Games, Change.org user XYZ collected over 50,000 signatures for West's removal as headliner citing the headlining artist should be Canadian." provide a valid answer to "For what event was the largest amount of signatures collected in an attempt to keep Kanye from performing at it?"?
A:
no