Flag of Belgrade
The flag of Belgrade is composed of three Serbian national colours: red, blue and white.
 The blue symbolises hope and faith in better future.
 The red of the ground is a symbol of the suffering of Serbian people in a struggle for freedom.
 Two horizontal white lines represent the Sava and Danube rivers, which are symbols of the strength of Belgrade.
 They are white according to heraldry rules.
 "Beograd" is Serbian name for "white city," so there are white walls and towers.
 The walls represent a merchant city; the towers and open gate represent an open market.
 The ship, a Roman trireme, is a symbol of the antiquity of the city.
Hollis (singer)
Hollis Wong-Wear, known mononymously as Hollis, is an American singer-songwriter and creative producer.
 She is best known for featuring on "White Walls", a song by Macklemore and Ryan Lewis, which also featured Schoolboy Q.
 Hollis is also a spoken-word artist.
 Her major debut was on Macklemore & Ryan Lewis' debut album, "The Heist".
 This was followed by the single "White Walls" in which she did the vocals for Macklemore and Ryan Lewis.
 This song peaked at number 15 on the Billboard Hot 100 chart.
Nebo – eto ya
Nebo – eto ya (Russian: Небо — это я ; literally: Heaven - It's Me) - is a 2004 studio album of Sofia Rotaru, recorded at Artur-Music in Ukraine.
 The album was released in the autumn of 2004 in Russia and Ukraine as well as worldwide simultaneously.
 The album includes earlier unreleased singles and two remixes of the song White Dance (Russian: Belyi tanets/Белый танец .
 Besides the original playing time of 47:54, the album includes a bonus and a music video for White Dance by Oleg Gusev, filmed at Lenfilm.
 The original discs sold with 1.700.000 copies.
Aneb-Hetch
Aneb-Hetch ("White Walls", also Inbu-Hedj, "White fortress") was one of 42 nomes (administrative division) in Ancient Egypt.
Jan Marini
Jan Marini Alano started her showbiz career in Ang TV, ABS-CBN’s teen-oriented gag/variety show in the early 1990s.
 As one of the resident singers of the show, Jan honed her talents resulting in television appearances as a performer in various variety shows in the country.
 She released her eponymous debut album in 1995 with the single “Love Song” highlighting her soulful voice.
 She was included in the cast of the original soap Mula sa Puso as the lead’s best friend.
 Her appearance in the series paved the way for Jan to play different roles in numerous drama series and specials of the two major networks.
 She has also appeared in several mainstream and indie films throughout her career.
 Jan has also performed live at music bars in the Metro.
 In late 2010, Jan released her sophomore entitled “Once” boasting 11-tracks of both revivals and originals, two of which were penned by Jan herself including the carrier single “White Walls.”
 Her most recent regular appearance for TV was for ABS-CBN's "Pangako Sa'yo".
Meleana (musician)
Meleana Brown (born September 11, 1988), who goes by the stage name Meleana, is an American Christian musician.
 She started her music career, in 2003, with appearing on "American Idol" during season 3, where she was eliminated during Hollywood Week.
 Her next appearance was on the only season of "Duets".
 Brown signed with Dream Records, where they released her first studio album, "White Walls" (2016).
Kraco Enterprises
Kraco Enterprises, LLC, is primarily a fabricated rubber products manufacturing company.
 While they mainly produce floormats, they have also produced tire walls and even audio equipment including car speakers, stereos, and CB radios. Kraco was founded in 1954 in Compton, California.
 Their first product was "Snap-on" white walls to create temporary white-walled tires.
 They moved into making rubber, vinyl and soon thereafter, carpet floormats as the business expanded.
Last of the Ghetto Astronauts
Last of the Ghetto Astronauts is the debut album of the Matthew Good Band.
 It was released independently in 1995 on a budget of roughly $5,000 CAD.
 With the singles "Alabama Motel Room", "Symbolistic White Walls", the album achieved popularity, particularly in western Canada.
 It gained the title of highest-selling independent album in Canada, a title it holds to this day.

Question: Who released the song White Walls?
Answer: Macklemore LLC