Question: Which singer was born earlier, Warrel Dane or Grace Slick?

Context articles: Warrel Dane
Darby Slick
Praises to the War Machine
David Miner (musician)
Software (album)
Grace Slick
Modern Times (Jefferson Starship album)
The Best of Grace Slick
Nothing's Gonna Stop Us Now
Dreaming Neon Black

Warrel Dane (born March 7, 1969) is the lead singer of the American power metal band Sanctuary.
 He is also known as the former lead singer of currently inactive progressive metal band Nevermore.
 He is a natural baritone, though he was known for his high-pitched vocals with Serpent's Knight and on the first two Sanctuary albums.
 Later in his career, Dane became more notable for his distinctively deep, dramatic voice.
Darby Slick is an American guitarist and songwriter, best known as a former member of The Great Society, and as the writer of the Jefferson Airplane song, "Somebody to Love".
 In 1965, he co-founded The Great Society with his brother Jerry Slick, Jenn Piersol, and his sister-in-law Grace Slick (David Miner and Bard Du Pont would join shortly after).
 Darby played lead guitar and occasionally performed backup vocals early on and less often towards the disbanding.
 He wrote some other songs for The Great Society, including "Free Advice" and "Darkly Smiling".
Praises to the War Machine is the debut and only solo release/album by heavy metal vocalist Warrel Dane from Nevermore, released on April 25, 2008.
 The album was produced by Peter Wichers, who was tapped by Dane to work on the album while Wichers was still a member of Soilwork.
 After leaving that band in 2007, Wichers co-wrote the album with Dane and played on eight of its tracks.
 Soilwork drummer Dirk Verbeuren and former Himsa guitarist Matt Wicklund also played on the album.
 Nevermore guitarist Jeff Loomis and the band's touring guitarist at the time Chris Broderick make guest appearances, along with James Murphy, who had performed on the Nevermore album "This Godless Endeavor".
 "Praises to the War Machine" includes two cover songs, The Sisters of Mercy's "Lucretia My Reflection" and "Patterns" by Paul Simon.
 Dane had previously covered a Simon song on Nevermore's album "Dead Heart in a Dead World".
David Miner (Born Ft. Worth, Texas on July 24, 1945), sometimes credited as David Minor, is an American guitarist, singer and songwriter, perhaps best known as a member of Grace Slick's The Great Society in the 1960s.
 He actually co-founded The Great Society along with Jerry, Darby, and Grace Slick as well as Bard Du Pont, in the sense that he was there from the start.
 Miner sang most of the lead vocals in the early days of the band and would also write a number of songs including "That's How It Is," "You Can't Cry," and "Daydream Nightmare love."
Software is Grace Slick's 1984 album released by RCA Records.
 This album was recorded after she had re-joined Jefferson Starship.
 After working on this album, Peter Wolf would go on to contribute to Jefferson Starship's 1984 album, "Nuclear Furniture".
 A music video was made for the single "All the Machines".
 "Software" is Grace Slick's fourth and final solo album.
Grace Barnett Slick (born October 30, 1939) is an American singer-songwriter, musician, artist, and former model, widely known in rock and roll history for her role in San Francisco's burgeoning psychedelic music scene in the mid–1960s.
 Her music career spanned four decades, and involved the Great Society, Jefferson Airplane, Jefferson Starship, and Starship, as well as a sporadic solo career.
 Slick provided vocals on a number of iconic songs, including "Somebody to Love", "White Rabbit", "We Built This City" and "Nothing's Gonna Stop Us Now".
Modern Times is a 1981 album by Jefferson Starship.
 Grace Slick appeared on this album after a three-year absence.
 She returned near the end of the recording sessions, providing background vocals on some tracks as well as lead vocals on the single "Stranger" as a duet with lead singer Mickey Thomas.
 Although not appearing in the band picture on the gatefold cover, she is listed on the back cover of the LP with the credit "Introducing Grace Slick" and her picture is on the lyric sleeve with the note "Grace Slick courtesy of Grace Slick."
 She joined the band officially for the 1981 tour.
 MTV debuted in 1981 and this was the first Jefferson Starship album to have promotional music videos.
 It was also the first album to feature a charting single on the Mainstream Rock Tracks chart, which had premiered earlier in the year.
 The single "Find Your Way Back" reached #3 on the Mainstream Rock chart.
The Best of Grace Slick is a compilation album of Grace Slick's work, focusing mostly on work with Jefferson Airplane, Jefferson Starship and Starship.
 There are three tracks that are from her solo albums, although no tracks appear from "Dreams" (1980).
"Nothing's Gonna Stop Us Now" is a 1987 song co-written by Albert Hammond and Diane Warren, recorded by the American rock band Starship in 1986.
 It is a duet featuring Starship vocalists Grace Slick and Mickey Thomas.
 Featured as the theme to the romantic comedy film "Mannequin", it hit No. 1 in the "Billboard" Hot 100 on April 4, 1987 and reached No. 1 on the UK Singles Chart for four weeks the following month and became the UK's 2nd biggest selling single of 1987.
 The song also reached the top 10 in six European countries.
 The single became the first number one single by songwriter Diane Warren.
 At the time, it made Grace Slick (aged 47) the oldest woman to have a number one single in the United States though the record was later broken by Cher's "Believe" in 1999 (aged 52).
Dreaming Neon Black is the third full-length album released by Seattle progressive metal band Nevermore, and was released through Century Media in 1999.
 Unlike its predecessor, "The Politics of Ecstasy", this album is very emotional and contains many slower, ballad-type songs.
 It is also notable that "Dreaming Neon Black" is a concept album of sorts.
 According to Nevermore's lead singer, Warrel Dane, "it's a very simple story about a man who slowly goes insane after losing a woman that he was very close to.
 Progressive levels of insanity are expressed in the songs, he goes through phases of denial and self-blame, blaming God, then denouncing God.
 The ending is a little...tragic, a little depressing.
 Shakesperian.
 Everybody dies, it's all happy."
, which may be based on an event in the life of Dane.
 Supposedly, his old girlfriend left him when she joined a religious cult and was never heard from again, and he began having nightmares of her crying out to him as she drowned.
 This has been confirmed by Warrel himself in an older interview.
 The spoken word samples from the tracks "Ophidian" and "Forever" are from the Clive Barker movie, "Lord of Illusions".