Question: Both Lacey Sturm and Natalie Maines have what occupation?

full_context: Document 1: Dixie Chicks: Dixie Chicks are an American country music band which has also crossed over into other genres, including pop and alternative country. The band is composed of founding members (and sisters) Martie Erwin Maguire and Emily Erwin Robison, and lead singer Natalie Maines. The band formed in 1990 in Dallas, Texas, and was originally composed of four women performing bluegrass and country music, busking and touring the bluegrass festival circuits and small venues for six years without attracting a major label. After the departure of one bandmate, the replacement of their lead singer, and a slight change in their repertoire, Dixie Chicks soon achieved commercial success, beginning in 1998 with hit songs "There's Your Trouble" and "Wide Open Spaces".
Document 2: Nawal al-Hawsawi: Nawal al-Hawsawi is a Saudi-Arabian pilot, and a female. This is not common, if not almost impossible in Saudi Arabia, making Nawal al-Hawsawi a pioneer and a problem for the monarchy in the country. She also has led the county's women in fights against racism and domestic violence. She has been referred to as the "Rosa Parks of Saudi Arabia", due to her in dominatable spirit and desire to see women move forward in her country. Al-Hawsawi, who originated from Mecca, married a white American male, breaking this common tradition of only marrying within her religion and her race, as well as marrying outside her culture. . She has a commercial pilot's license and is also a mental health counselor and marriage therapist. These are not traditional fields for women in Saudi Arabia, and further the strain that al-Hawasai has felt from her relations with the monarchy in Saudi Arabia. She founded the therapy provider Soundheart.org, which is not allowed to pass through filters on the internet with Saudi Arabia. She has 50,000 followers on Twitter, and actively utilizes social media to strengthen her causes and beliefs. She receives a lot of pejorative commentary on social media, but meets it with grace and strength. The fact she is black and Saudi Arabian, also create issues for her in the western community, but she is not daunted by this. She was verbally abused by a woman in Saudi, where verbal abuse is a crime. She won her case in Saudi Arabia, but she dropped charges against the woman, who is now her friend. She never identified herself as black until time spent in the United States, where she learned to fly and got her license. She is not permitted to fly an aircraft in Saudi Arabia.
Document 3: Life Screams: Life Screams is the debut solo studio album by the American singer Lacey Sturm. It was released on February 12, 2016 through Followspot Records. The album has sold 9,000 copies in the United States.
Document 4: Lacey Sturm: Lacey Nicole Sturm (née Mosley, born September 4, 1981) is an American singer and songwriter from Homestead, Florida, raised in Arlington, Texas. She is co-founder and former lead vocalist of the hard rock band Flyleaf. In February 2016, Sturm became the first solo female to top the "Billboard" Hard Rock Albums chart with her debut release.
Document 5: Travelin' Soldier: "Travelin' Soldier" is a song written and originally recorded by American country music artist Bruce Robison in 1996 and again, in rewritten form, in 1999. It was later recorded by Ty England on his 1999 album, "Highways & Dance Halls". The first rendition to be issued as a single was by the Dixie Chicks in December 2002, from their album "Home". It became the group's sixth and final single to reach No. 1 on "Billboard" "Hot Country Singles & Tracks" (now "Hot Country Songs"). A version of the song featuring Natalie Maines of the Dixie Chicks, Bruce Robison and Robison's wife, Kelly Willis, appears on "KGSR's Broadcasts Vol. 13" album. Aaron Lewis also recorded a cover of the song as a duet with his daughter Zoe on his 2016 album "Sinner".
Document 6: Protesting the Dixie Chicks: Protesting the Dixie Chicks is a documentary by American filmmaker Christopher Fleeger, independently released on DVD in 2006. The film captures the storm of controversy ignited by the remarks of Natalie Maines, lead singer of the Texas pop-country trio the Dixie Chicks. On March 10, 2003, Natalie Maines, at a concert in London, stated that her group was "ashamed" to be from the same state as President George W. Bush. In the man-on-the-street style of "Heavy Metal Parking Lot", anonymous fans and protesters are interviewed outside the arenas of the Dixie Chicks 2003 USA tour, while the context of the drama is reenacted with toys and action figures of Natalie Maines, Toby Keith, General John Abizaid, Senator Richard Lugar, Senator John McCain and President George W. Bush.
Document 7: New Horizons (Flyleaf album): New Horizons is the third full-length studio album by American rock band Flyleaf, released on A&M/Octone Records on October 30, 2012. It was produced by Howard Benson, who has produced several of Flyleaf's previous recordings. It is the final album with lead vocalist Lacey Sturm, who announced her departure from the band, just prior to the album's release, in October 2012.
Document 8: Between the Stars: Between the Stars is the fourth full-length studio album by American rock band Flyleaf. The album was released on September 16, 2014 through Loud & Proud Records. The group funded the album through PledgeMusic. It marks the group's first and only record to feature Kristen May on vocals, who replaced original vocalist Lacey Sturm who exited the band in 2012. May exited the band in 2016. It is the group's first album to be recorded by producer Don Gilmore. Studio recording was completed in Los Angeles, CA. The album's lead single "Set Me on Fire" debuted on July 1, 2014 at Revolver.
Document 9: Jaclyn Stapp: Jaclyn Nesheiwat Stapp (born July 29, 1980) is a beauty queen, philanthropist and fashion model with pageant roots in Florida and New York. She is married to Scott Stapp, former frontman of the band Creed, and current frontman for the band Art of Anarchy. Her most notable titles include Mrs. Florida America 2008 and Miss New York USA 2004. She is executive director of The Scott Stapp With Arms Wide Open Foundation.
Document 10: N.A.T.o. (singer): n.A.T.o. is the stage name of Natalya Shevlyakova (Russian: Наталья Шевлякова ), a Russian singer of Russian and Georgian origin. She is known for dressing in traditional Arab style, with a veil or hijab, and singing in the Tajik, Persian and Uzbek languages. Her concert performances started in 2004 in Moscow, on the anniversary of the September 11 attacks, in a concert with a "terrorist" theme. Her performing career was developed by Russian producer Ivan Shapovalov and she was last seen performing in Germany in May 2005. Her songs often express anti-war themes. One of her most famous anti-war pieces is Chor Javon, (Chorzhavon) originally composed by famous Tajik singer Muboraksho Mirzoshoyev.
Document 11: Natalie Merchant: Natalie Anne Merchant (born October 26, 1963) is an American singer-songwriter and musician. She joined the American alternative/folk rock band 10,000 Maniacs in 1981 and left it to begin her solo career in 1993. She has since released seven studio albums.
Document 12: Natalie Maines: Natalie Louise Maines (born October 14, 1974) is an American singer-songwriter and activist who achieved success as the lead vocalist for the female alternative country band the Dixie Chicks. Born in Lubbock, Texas, Maines considers herself a rebel who "loved not thinking in the way I knew the majority of people thought."
Document 13: Storm Large: Storm Large (born Susan Storm Large, June 25, 1969) is a singer, songwriter, actress and author. She attracted national attention as a contestant on the CBS reality television show "". For many years solely a rock artist, in recent years she has branched out into the theater and cabaret world. A resident of Portland, Oregon, she currently balances performing with her own band in venues around the country and touring with the Portland-based band Pink Martini around the world.
Document 14: Halestorm: Halestorm is an American hard rock band from Red Lion, Pennsylvania, consisting of lead vocalist and guitarist Lzzy Hale, her brother drummer and percussionist Arejay Hale, guitarist Joe Hottinger, and bassist Josh Smith. The group's self-titled debut album was released on April 28, 2009, through Atlantic Records. Their second album "The Strange Case Of..." was released on April 10, 2012. Its lead single "Love Bites (So Do I)" from that album won their first Grammy Award for Best Hard Rock/Metal Performance on February 10, 2013.
Document 15: Natalie Sims: Natalie Lauren Sims (born June 25, 1984), also known by her stage name Natalie Lauren and former stage name Suzy Rock, is a recording artist, songwriter, graphic designer, writer, and music executive from Tulsa, Oklahoma. As a solo artist she performs within the Christian hip hop and r&b genres, having released three EPs and a mixtape as well as being featured on numerous songs by other artists. She also is a member of High Society Collective – along with Sho Baraka, Swoope, and J.R. – which released a studio album, "Circa MMXI: The Collective," in 2012.
ground_truth: American singer-songwriter