Question: Nate Ruess and Mary Ramsey, are of which nationality?

Context paragraphs:
The Format: The Format was an American indie rock band formed by Nate Ruess and Sam Means.  The band announced a hiatus on February 4, 2008.  Their style can be considered a mixture of indie, alternative, punk and folk music, with elements of 1960s and 1970s pop music.  Though Means and Ruess are the foremost members of the band, they have played, toured, and recorded with Mike Schey, Mark Buzard, Don Raymond, and—for the DVD recording and summer 2007 tour—The Honorary Title's current drummer and The Format alumnus Adam Boyd.  The Format chose their name to make fun of the music industry's inclination towards a cookie-cutter "format" for a hit.

The Vanity Label: The Vanity Label is an American record label created by Nate Ruess and Sam Means of The Format, the label’s only signed artist (as of 2007).  The company was created by Ruess and Means subsequent the absorption of Elektra Records into Atlantic Records Group in 2004, as The Format was dropped from the newly formed Atlantic Records Group.  The newly formed Vanity Label was created to launch their then upcoming album, and Vanity Label’s first album release, "Dog Problems".

Grand Romantic: Grand Romantic is the debut studio album of Nate Ruess, lead vocalist from The Format and Fun.  It was released on June 16, 2015, by Fueled By Ramen.  The album was produced by Some Nights producer Jeff Bhasker.  Following the hiatus of Fun, Ruess announced that he would be working on material for a solo project.

Nate Ruess: Nathaniel Joseph Ruess (born February 26, 1982) is an American singer and songwriter.  He is the lead singer of the indie pop band Fun. , and previously of The Format.  As of 2015, he also performs as a solo musician.

Mary Ramsey: Mary Ramsey (born 24 December 1963), a resident of Buffalo, New York, is a member of folk rock duo John & Mary and lead singer and violinist for the American alternative rock band 10,000 Maniacs.  Ramsey has also worked with other well-known artists such as Jackson Browne, Goo Goo Dolls, Billy Bragg, Warren Zevon, Alex Chilton and Ani DiFranco.

Just Give Me a Reason: "Just Give Me a Reason" is a song recorded by American singer and songwriter Pink, featuring fun. 's lead singer Nate Ruess.  The song was chosen as the third single from Pink's sixth studio album, "The Truth About Love" (2012).  Jeff Bhasker assisted the artists in writing the song and is also the producer.  "Just Give Me a Reason" is a pop ballad about the desire to hold on to a relationship even when it appears to be breaking down.  It starts off with a simple melody played on the piano, as Pink starts to sing the first verse and chorus, the latter of which introduces drum machines and bass.  Ruess then sings the second verse, and the rest of the song is sung as a duet.  The song ends with a piano solo, similar to the intro.  It has a duration of four minutes and two seconds.

List of number-one singles of 2013 (Australia): The ARIA Singles Chart ranks the best-performing singles in Australia.  Its data, published by the Australian Recording Industry Association, is based collectively on each single's weekly physical and digital sales.  In 2013, seventeen singles claimed the top spot, including "Thrift Shop" by Macklemore and Ryan Lewis, which started its peak position in late 2012.  Fifteen acts achieved their first number-one single in Australia, either as a lead or featured artist: Mary Lambert, Nate Ruess, Baauer, Ray Dalton, Passenger, Daft Punk, Pharrell Williams, Robin Thicke, T.I., Avicii, 2 Chainz, Redfoo, Dami Im, Taylor Henderson and John Legend.  Im and Henderson were the only Australian artists to achieve a number-one single.

Love Among the Ruins (album): Love Among the Ruins (1997) was the first album released by 10,000 Maniacs with their new lead singer, Mary Ramsey, after Natalie Merchant left in 1993.  The two singles from the album, "More Than This" and "Rainy Day", were not originally intended to be included on the album at all.  John Lombardo had just written "Rainy Day", which was deemed more radio friendly than the other songs, and the record company insisted that the band record a cover song for inclusion.  The band chose to credit the songs as group collaborations so that all members would receive equal royalties.  Ramsey and Lombardo shared the lyric writing.  Ramsey wrote the music to "All That Never Happens".  Lombardo wrote "Rainy Day", "Even with My Eyes Closed", "Big Star", "Shining Light" and "Across the Fields".  Lombardo shared a writing credit with Jerry Augustyniak on "Girl on a Train".  Rob Buck wrote "Love Among the Ruins", and Dennis Drew wrote "A Room For Everything".  A live version was also included on their 2016 album "Playing Favorites".

Some Nights (song): "Some Nights" is a song by American indie pop band Fun.  It was released on June 4, 2012, as the second single from their second studio album of the same name.  The song was written by Jeff Bhasker, Nate Ruess, Andrew Dost, and Jack Antonoff.  Musically "Some Nights" is an indie pop song with elements of power pop and afrobeat while the lyrics depict the protagonist having an existential crisis.

Mary Ramsey Wood: Mary Ramsey Wood aka Mary Ramsey Lemons Wood (May 20, 1787/circa 1810 (disputed) – January 1, 1908) was an American pioneer known as the "Mother Queen of Oregon".  She was reported to be the oldest living person in the United States when she died, supposedly at the age of 120.  It is said she traveled to the Oregon Territory across the Oregon Trail at the age of 66.  There is evidence this age claim was inaccurate or exaggerated, however, and she may have been between 96 and 98 when she died.

Supporting paragraphs: Nate Ruess Mary Ramsey
Answer: American