Question: When was the vocalist that took over Bruce Dickinson's position as the lead vocalist for Iron Maiden born? 

Context paragraphs:
Wolfsbane (album): Wolfsbane was the 1994 third eponymous album from British heavy metal band Wolfsbane.  Not long after the album's release, vocalist Blaze Bayley took over Bruce Dickinson's position as the lead vocalist for Iron Maiden.  It would end up becoming Wolfsbane's final studio album before their 16-year breakup from 1994 to 2010.

Tyranny of Souls: Tyranny of Souls is a heavy metal album released by Iron Maiden vocalist Bruce Dickinson on 23 May 2005.  The cover art is a work by renaissance artist Hans Memling.  It is his first solo album since rejoining Iron Maiden in 1999 and his most recent studio album as a solo artist.

List of songs recorded by Iron Maiden: Iron Maiden are an English heavy metal band formed by bassist Steve Harris in 1975.  The band's first album, 1980's "Iron Maiden", was written primarily by Harris, with vocalist Paul Di'Anno co-writing two tracks and guitarist Dave Murray contributing "Charlotte the Harlot".  The 1981 follow-up, "Killers", was written almost entirely by the bassist, with frontman Di'Anno contributing only to the title track, "Killers" (the North American bonus track "Twilight Zone" was credited to Harris and Murray).  Bruce Dickinson replaced Di'Anno after the release of "Killers", although he did not contribute any songwriting to "The Number of the Beast", released in 1982, which featured three songs co-written by guitarist Adrian Smith.  "The Number of the Beast" also spawned Iron Maiden's first UK Singles Chart top ten in the form of "Run to the Hills", which charted at number seven on its release.  It was not until 1983's "Piece of Mind" that the songwriting process became a more varied and collaborative approach, with just four of its nine tracks being credited solely to Harris, two to Dickinson and Smith, one to Harris and Murray, one to Dickinson alone, and one to Harris, Dickinson, and Smith.  The Dickinson and Smith-penned "Flight of Icarus" was the first Iron Maiden single to chart in the United States, reaching number eight on the "Billboard" Mainstream Rock chart.

The Book of Souls World Tour: The Book of Souls World Tour was a concert tour by Iron Maiden, held in support of their sixteenth studio album, "The Book of Souls".  The first leg of the tour saw the band play shows in 36 countries across six continents, which included their debut performances in El Salvador, Lithuania and China.  With 117 shows, it was the longest tour with Bruce Dickinson on vocals since the "Somewhere on Tour" in 1986-87.  The group, their crew and equipment were transported on a customised Boeing 747-400, nicknamed "Ed Force One", which was piloted by vocalist Bruce Dickinson.

Virtual XI World Tour: The Virtual XI Tour was a concert tour by the heavy metal band Iron Maiden from 22 April 1998 to 12 December 1998.  As with their previous tour, several of the band's U.S. shows had to be cancelled after vocalist Blaze Bayley had issues with his voice, this time reportedly from an allergic reaction to pollen and dust while the group were in Nevada and Arizona.  The band later made up the Los Angeles and San Diego dates.  This would be Iron Maiden's last tour with Bayley as then former vocalist Bruce Dickinson would return to the group the following year.

Samson (band): Samson were a British hard rock band formed in 1977 by guitarist and vocalist Paul Samson.  They are best known for their first three albums with future Iron Maiden singer Bruce Dickinson, then known as "Bruce Bruce", and drummer Thunderstick (real name Barry Graham Purkis), who wore a leather mask and performed on stage in a metal cage.  Drummer Clive Burr was also a member of the band, both before and after his tenure with Iron Maiden.  Drummer Mel Gaynor had a successful music career being a member of Simple Minds for over 20 years.  Dickinson's replacement on vocals, Nicky Moore, performed with Samson throughout the mid-1980s and again from the late 1990s onwards; he has also been a member of the bands Mammoth and Nicky Moore and the Blues Corporation.

Balls to Picasso: Balls to Picasso is a Hard rock album by Iron Maiden vocalist Bruce Dickinson, released in 1994.  It is the second effort in Dickinson's solo career and the first released after he had officially left Iron Maiden.

The Wicker Man (song): "The Wicker Man" is a song by Iron Maiden, released as the first single and opening track from their album "Brave New World" in April 2000.  It is also the first single by the band since the returns of vocalist Bruce Dickinson and guitarist Adrian Smith in 1999.  It was co-written by Smith, Dickinson and Steve Harris.  It was co-produced by Kevin Shirley and Harris.  The title is inspired by the British cult film of the same name.  The song should not be confused with "Wicker Man" from Dickinson's solo career, the lyrics of which are more closely themed around the film.  The latter song can be found on the 2 disc edition of "The Best of Bruce Dickinson".

Bruce Dickinson discography: Bruce Dickinson, a British heavy metal singer, has released six studio albums, two live albums, one compilations, ten singles, three video albums, fourteen music videos, and one box set.  In 1979, after playing in local groups, Dickinson joined hard rock band Samson.  He departed after two years to become Iron Maiden's lead vocalist.  His debut with this band is considered a "masterpiece", which was followed with a series of top-ten releases.  In 1989, while Iron Maiden were taking a year off, Dickinson and former Gillan guitarist, Janick Gers, composed a song for .  His solo debut, "Tattooed Millionaire" (1990), was an effort that favoured a hard rock/pop metal approach, different from what fans assumed would be an aggressive, Iron Maiden-like album.  Four songs—the title track, "Dive!  Dive!  Dive! ", "Born in '58", and a cover version of David Bowie's "All the Young Dudes"—were released as singles.  Dickinson returned to Iron Maiden, accompanied by Gers as the new guitarist, and the project went on hiatus. " Dive!  Dive!  Live! " was a live video recorded from a concert in Los Angeles, California, in August 1990, and released in July 1991.

Blaze Bayley: Blaze Bayley (born Bayley Alexander Cooke, 29 May 1963) is an English singer, musician, songwriter, and lyricist.  He was the lead singer of Wolfsbane from 1984 to 1994, and currently from 2010 following reunions in 2007 and 2009.  Bayley was also the lead singer for Iron Maiden from 1994 to 1999.  Since then, he has embarked on a solo career.

Supporting paragraphs: Wolfsbane (album) Blaze Bayley
Answer: 29 May 1963