Question: Heidi Newfield and Tim Rushlow, have which nationality?
Related documents: [0]  [DOC] Timothy Ray "Tim" Rushlow (born October 6, 1966) is an American country music artist. Between 1991 and 1997, Rushlow was lead vocalist of country music group Little Texas, which recorded four albums and a Greatest Hits package, in addition to charting more than fifteen singles on the "Billboard" country singles charts during Rushlow's tenure as lead vocalist. [END] 
[1]  [DOC] Heidi Newfield (born October 4, 1970) is an American country music artist. She was lead singer, rhythm guitarist and harmonica player for the group Trick Pony, alongside Keith Burns and Ira Dean from 1996 until 2006, when she left in pursuit of a solo career. Newfield has begun her solo career on Curb Records, debuting in 2008 with the single, "Johnny & June." This song, which peaked at No. 11 on the Hot Country Songs charts, is the first release from her solo debut album, "What Am I Waiting For", which has produced a second Top 30 country hit, "Cry Cry ('Til the Sun Shines)." [END] 
Answer: 
American
American