Question: En Vogue is an American R&B/Pop vocal group whose original lineup consisted of singers Terry Ellis, Dawn Robinson, Cindy Herron, and Maxine Jones. Formed in Oakland, California in 1988, En Vogue reached number two on the US Hot 100 with the single "Hold On", which was taken from their 1990 debut album Born To Sing. The group's 1992 follow-up album Funky Divas reached the top 10 in both the US and UK, and included their second US number two hit "My Lovin' (You're Never Gonna Get It)", plus the US top 10 hits "

In the late-1980s, Oakland-based production and songwriting duo Denzil Foster and Thomas McElroy first conceived the idea of a modern-day girl group in the tradition of The Supremes, Martha and the Vandellas, The Ronettes and other commercially successful female bands which had flourished in the late 1950s and early 1960s when they were assembling their 1988 compilation project FM2 for Atlantic Records. Foster and McElroy envisioned an entertainment unit with interchangeable but not identical parts in which every member would qualify to take the lead on any given number. Thus, their plan was to recruit singers who possessed strong voices, noticeably good looks, and intelligence. Approximately 3000 women attended the auditions held in 1988, with Dawn Robinson, Cindy Herron, and Maxine Jones making the final cut. Originally conceived as a trio, Foster and McElroy decided to create a quartet after hearing Terry Ellis audition whose plane had been late from Houston, Texas. At first, they selected the band name 4-U but soon shifted to Vogue, ultimately settling on En Vogue, upon learning that another group had already claimed the Vogue moniker.  After forming, the group began working with their producers on their debut album. Recording began in August 1989 and wrapped up in December of the same year. Born to Sing was released on April 3, 1990. The album peaked at No. 21 on the Billboard 200 chart and No. 3 on Billboard's R&B Albums Chart. The first single, "Hold On," was released to radio in late February 1990 and became a crossover pop hit, reaching No. 2 on the Billboard Hot 100 singles chart, and No. 1 on both the R&B singles and Hot Dance Music/Club Play charts. It later went to No. 5 in the UK, and became a hit in Europe. The next two singles, "Lies" and "You Don't Have to Worry," each went to No. 1 on the Billboard R&B charts, while the fourth and final single, "Don't Go," charted at No. 3 on the Billboard R&B. The album was later certified triple platinum by the RIAA.  "Hold On" was awarded a Billboard Music Award for "#1 R&B Single of the Year," a Soul Train Award for "R&B/Urban Contemporary Single of the Year, Group, Band or Duo" and have been nominated for a Grammy Award for Best R&B Vocal Performance by a Duo or Group. In 1990, En Vogue signed an endorsement deal to appear in a Diet Coke commercial directed by Spike Lee.

Using a quote from the above article, answer the following question: When was En Vogue formed?
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Answer: 1988,

Problem: Avenged Sevenfold (sometimes abbreviated as A7X) is an American heavy metal band from Huntington Beach, California, formed in 1999. The band's current lineup consists of lead vocalist M. Shadows, rhythm guitarist and backing vocalist Zacky Vengeance, lead guitarist and backing vocalist Synyster Gates, bassist and backing vocalist Johnny Christ, and drummer Brooks Wackerman. Avenged Sevenfold is known for its diverse rock sound and dramatic imagery in album covers and merchandise. Avenged Sevenfold emerged with a metalcore sound on the band's debut Sounding the Seventh Trumpet and continued this sound through their second album Waking the Fallen.

On April 11, 2012, Avenged Sevenfold won the award for "Best Live Band" and "Most Dedicated Fans" at the Revolver Golden Gods awards. The band toured through Asia into April and early May, and played at the Orion Music + More, Festival on June 23 and 24 in Atlantic City, New Jersey alongside Metallica and Cage the Elephant among many others.  On September 24, 2012, Avenged Sevenfold released a new song, titled "Carry On"; it was featured in the video game Call of Duty: Black Ops II. On November 15, 2012, vocalist M. Shadows said that the band had been working on a new album since the recording of "Carry On" in August 2012. The band began recording material for the album in January 2013. The band then started streaming snippets of the album in May 2013 on their new radio app. There, Arin Ilejay was confirmed as an official band member and replacement of deceased The Rev. M. Shadows said that the album would sound more blues rock-influenced and more like classic rock/metal like Black Sabbath and Led Zeppelin.  The band was confirmed to play at the 2013 Rock in Rio festival on September 22, 2013. On May 24, 2013, the band have announced dates for their European tour with Five Finger Death Punch and Device serving as their support bands.  The album, entitled Hail to the King, was released on August 27, 2013. This is the first Avenged Sevenfold album without any musical contributions from deceased The Rev. The album's lead single and title track was released on July 15, 2013. Hail to the King charted as No. 1 on the US Billboard 200, the UK albums chart, as well as the Finnish, Brazilian, Canadian, and Irish charts, and was commercially and critically acclaimed. The band headlined Monster Energy's Welcome to Rockville two-day music festival in Jacksonville, FL, April 26-27, 2014, joined by more than 25 rock acts, such as Motorhead, Rob Zombie, Chevelle, Korn, Staind, Alter Bridge, The Cult, Five Finger Death Punch, Volbeat, Black Label Society, and Seether. On June 13, the band headlined the Friday night of Download Festival 2014. The band also headlined the Mayhem Festival 2014 with Korn, Asking Alexandria, and Trivium.  In March 2014, vocalist M. Shadows revealed in an interview with Loudwire that the band had plans in the works to put something out for the overdue 10th anniversary of Waking the Fallen. Waking the Fallen: Resurrected was released August 25, 2014. The reissue charted No. 10 on the US Billboard 200.

what was interesting during this period?

Answer with quotes:
On September 24, 2012, Avenged Sevenfold released a new song, titled "Carry On"; it was featured in the video game Call of Duty: Black Ops II.