Question: In which country is the league based that Frank Zappa denied an apology to regarding his song "Jewish Princess"?

Barking Pumpkin Records is an independent record label based in California that specialized in mail order releases.  The label was founded in 1981 by Frank Zappa.  Its catalog has included "The Old Masters" box sets, which consisted of boxed reissues of albums previously released by Zappa on other labels and original material by Frank Zappa which has since been nationally released by Rykodisc in different versions, as well as original and reissued by other artists, such as Dweezil Zappa and the group Z, which consisted of Dweezil and Ahmet Zappa.  After Frank Zappa died in 1993, Barking Pumpkin continued to release his posthumous albums, and new content by Z. <SEP> "Jewish Princess" is a song by Frank Zappa released on his album "Sheik Yerbouti" in 1979.  In an interview with Spin magazine he was almost offended saying, "…as if to say there is no such thing as a Jewish Princess.  The song is a humorous look at the Jewish-American princess stereotype which attracted attention from the Anti-Defamation League, to which Zappa denied an apology, arguing: "Unlike the unicorn, such creatures do exist — and deserve to be 'commemorated' with their own special opus".  Like I invented this?" <SEP> "Dancin' Fool" is a song by Frank Zappa from his 1979 album "Sheik Yerbouti".  It was the first of two singles released from the album, followed by the second single "Bobby Brown (Goes Down)."  The song premiered on stage sometime around Halloween in 1975, but was only part of the live set for three months; typically it was played alongside "Approximate", as the two songs displayed an odd contrast and Zappa embraced oddities.  Much like "Zoot Allures'" closing track "Disco Boy", it mocks the disco culture of the 1970s, but unlike "Disco Boy", the song directly focuses on the dancing aspect of the culture.  Specifically, the character Zappa is singing as cannot help but dance, despite how awful he is at it.  He refers to his dancing as "social suicide" and says, "The beat goes on and I'm so wrong."  He mentions as part of the reason for his bad dancing that, "One of my legs is shorter than the other," a reference to a severe injury Zappa sustained at the Rainbow Theatre in 1971.  Soon, it inspired crazy dance moves to mock disco dancers, and this was especially relevant, as disco was on its decline.  "Dancin' Fool" charted at 45 on the U.S. charts, making it Zappa's 2nd highest charting single, behind his 1982 song, Valley Girl.  The song was nominated for the Grammy award for "Best Male Vocal", but did not win.  It was included on Zappa's best of compilation, "Strictly Commercial". <SEP> The Anti-Defamation League (ADL; formerly known as the "Anti-Defamation League of B'nai B'rith") is an international Jewish non-governmental organization based in the United States.  Describing itself as "the nation's premier civil rights/human relations agency", the ADL states that it "fights anti-Semitism and all forms of bigotry, defends democratic ideals, and protects civil rights for all", doing so through "information, education, legislation, and advocacy".