Kazimierz Żegleń (Casimir Zeglen) - was a Polish engineer, born in 1869 near Tarnopol, (died 1910), who invented the first bulletproof vest.
 At the age of 18 he entered the Resurrectionist Order in Lwów (today Lviv, Ukraine).
 In 1890, he moved to the United States.
 In 1893, after the assassination of Carter Harrison, Sr., the mayor of Chicago, he invented the first commercial bulletproof vest.
 In 1897, he improved it together with Jan Szczepanik who was the inventor of the first commercial bulletproof armour in 1901.
 It saved the life of Alfonso XIII, the King of Spain - his carriage was covered with Szczepanik's bulletproof armour when a bomb exploded near it.
The Charlatans were an influential folk rock and psychedelic rock band that played a role in the development of the San Francisco music scene during the 1960s and are often cited by critics as being the first group to play in the style that became known as the San Francisco Sound.
 Exhibiting more pronounced jug band, country and blues influences than many bands from the same scene, the Charlatans' rebellious attitude and distinctive late 19th-century fashions exerted a major influence on the Summer of Love in San Francisco.
 Their recorded output was small, with their first album, "The Charlatans", not being released until 1969, some years after the band's heyday.
 The band is notable for featuring the first commercial appearance of Dan Hicks, later of Dan Hicks and His Hot Licks.
American entertainer Madonna has worked in twenty-six feature films (twenty-one as an actress), nine short films, three theatrical plays, ten television episodes, and sixteen commercials.
 In 1979, she made her acting debut in the low-budget feature, "A Certain Sacrifice".
 Its commercial release in 1985 coincided with the success of her second studio album, "Like a Virgin".
 That same year, she made a cameo appearance as a club singer in the film "Vision Quest"; she also garnered commercial and critical success for the title role in Susan Seidelman's "Desperately Seeking Susan".
 Madonna followed it with a leading role in the adventure drama, "Shanghai Surprise" (1986), with her then-husband actor Sean Penn.
 The film was panned by critics, and Madonna received her first Golden Raspberry Award for Worst Actress.
 Her next films such as "Who's That Girl" (1987) and "Bloodhounds of Broadway" (1989) were critical and commercial failures.
 In 1986, she made her theatrical debut in David Rabe's "Goose and Tom-Tom" and her first commercial for Mitsubishi in Japan.
 She starred in the 1989 commercial for Pepsi-Cola alongside her song "Like a Prayer".
 Due to the controversy surrounding the song's music video, the commercial was revoked and her contract with Pepsi-Cola was cancelled.
"Chelsea Morning" is a song written and composed by Joni Mitchell and recorded for the singer's second album, "Clouds," which she released in 1969.
 Prior to it coming out on the Mitchell album, the song had been issued as a single by Judy Collins earlier in the year and as a track on the debut album by Fairport Convention in 1968.
 Jennifer Warnes recorded it for her debut album, "I Can See Everything," also in 1968, and, in 1969, this version was released as a single.
 The earliest commercial appearance of the song, however, was likely its interpretation by Dave Van Ronk on his 1967 album "Dave Van Ronk and the Hudson Dusters."
The Palace Guard was an American garage rock band formed in Los Angeles, California in 1964.
 Though the band never obtained national success, they made a huge splash in Southern California with their song "Falling Sugar".
 The group is also notable for featuring the first commercial appearance of Emitt Rhodes, later a member of the Merry-Go-Round.
The Sea Will Claim Everything is a point-and-click adventure game, the first commercial video game from design team Jonas and Verena Kyratzes.
 Written by Jonas Kyratzes with graphics from Verena Kyratzes, it is the fourth game in their Lands of Dream series and was released May 25, 2012.
 It features a musical score by Chris Christodoulou.
 The game is available from the author's website and has occasionally been bundled with other games from various digital download portals.
 It was released on Steam on March 24, 2016.
"Everything Is Everything" is the third and final single from American recording artist Lauryn Hill's debut album, "The Miseducation of Lauryn Hill" (1998).
 Released on May 4, 1999 by Ruffhouse and Columbia Records, the song was written by Hill and Johari Newton, and produced by Hill.
 The song contains elements of R&B, '60s soul, gospel and hip hop influences.
 "Everything is Everything" garnered acclaim from critics, many of whom praised its lyrical themes and genre variance.
 The song marked the first commercial appearance of pianist John Legend, who was still in his late teens when the song was recorded.
 During the recording sessions, Hill wanted to write a song about injustice and struggles amongst youth communities in inner city America.
John Roger Stephens (born December 28, 1978), known professionally as John Legend, is an American singer, songwriter, musician and actor.
Shriya Saran is an Indian actress and model who has acted mostly in Telugu, Tamil and Hindi language films.
 She made her acting debut with the Telugu film "Ishtam" (2001) and had her first commercial success with "Santosham" (2002).
 The following year, she made her Hindi cinema debut with a supporting role in "Tujhe Meri Kasam", alongside Ritesh Deshmukh and Genelia D'Souza.
 It was followed by the commercially successful crime drama "Tagore" (2003), in which she was paired opposite Chiranjeevi.
 The same year, she played a supporting role in the Tamil-Telugu bilingual film "Enakku 20 Unakku 18", which marked her debut in Tamil cinema.
 In 2005, she had ten releases including "Mazhai", S. S. Rajamouli's "Chhatrapati", and "Mogudu Pellam O Dongodu", in which she was among the only three characters of the film.
 Saran's solitary release as a lead actress in 2006 was the Tamil film "Thiruvilaiyaadal Aarambam".
Skopsko (Macedonian: Скопско ) is the most popular beer in Macedonia.
 It has 64% of the market in Macedonia.
 It was the first commercial beer, the best-known and best-selling beer brand in the country.
 Once a "Best of Macedonia" has become "Our Best" and "Skopsko, and everything is possible" - are its most famous slogans.

Question: Everything is Everything marked the first commercial appearance of a singer born in what year ?
Answer: 1978