Question: Are Brett Hestla and Benjamin Kowalewicz both in the music business?

Context paragraphs:
New Music Seminar: The New Music Seminar (NMS) is a Music Conference and Festival held annually each June in New York City.  The New Music Seminar originally ran from 1980 – 1995 and was relaunched in 2009.  NMS features over 150 CEOs, Presidents, Executives, and leaders in the emerging music business along with over 100 artist performances.  The mission of the New Music Seminar is to grow a sustainable and better music business to allow creators the best opportunity to succeed.  The NMS strives to enable more artists to achieve success and encourages new levels of investment in music and artists

Peroxide (punk zine): Peroxide was a punk zine published and edited during the late 1970s by Andrew Thomas, Quentin Cook (a.k.a. Norman Cook) and Ian McKay).  Inspired by punk zines such as Chainsaw, "Peroxide" lasted only two issues, with McKay being ousted by Cook after the first issue.  Importantly however, the publication is noteworthy as it served to provide Cook with his first significant point of connection with the professional music business (his contact with Adam Ant being a notable example), and for both McKay and Thomas, their first experiences of publishing.  Whilst Cook remained in the music business, McKay became a writer on the visual arts and culture, while Thomas moved into the business sector; he is currently the publisher of "Communicate magazine" and owner of Cravenhill Publishing.

Popakademie Baden-Württemberg: The Popakademie Baden-Württemberg "(University of Popular Music And Music Business)" is a German public conservatory for popular music based in Mannheim, Germany.  Established in 2003 by the state of Baden-Württemberg, it was the first institution of higher education in Germany to offer academic degree programs focusing on popular music and music business.  It offers three bachelor and two master degree programs.

Mind Control (Tantric album): Mind Control is the fourth album by American post-grunge band Tantric and was released on August 4, 2009.  It is the band's second album under Silent Majority Group and was produced by Brett Hestla, marking Tantric's departure from mainstay producer Toby Wright.  "Mind Control" retains the band's 2008 lineup with the exception of drummer Kevin Miller who was replaced by Richie Monica.

Complete Music Update: Complete Music Update, originally called College Music Update, and better known as CMU or the CMU Daily, is a music news service and website aimed at people working in the UK music business and music media.  It primarily provides news and information about the music business, music media and music world.  It is now best known for its daily email newsletter, the CMU Daily.  Its current editor is Andy Malt.

Billy Talent: Billy Talent is a Canadian punk rock band from Mississauga, Ontario.  They formed in 1993 with Benjamin Kowalewicz as the lead vocalist, Ian D'Sa on guitar, bassist Jon Gallant and drummer Aaron Solowoniuk.  There have been no lineup changes, although Aaron is currently taking a hiatus from the band due to an MS relapse, Jordan Hastings from Alexisonfire, Cunter and Say Yes is currently filling in for him.  In the 24 years since their inception, Billy Talent sold well over one million albums in Canada alone and nearly 3 million albums internationally.

Brett Hestla: Brett Adam Hestla, (born February 4, 1973), is an American musician and record producer.

Dark New Day: Dark New Day, formerly known as "Dark Blue", was an American hard rock supergroup formed in 2004 featuring Brett Hestla of Virgos Merlot, Clint Lowery of Sevendust, Troy McLawhorn of DoubleDrive, Corey Lowery of Stereomud and Stuck Mojo, and Will Hunt of Skrape.  Their debut album, "Twelve Year Silence", was released in 2005, followed by the EP "Black Porch (Acoustic Sessions)" in 2006.  Though still inactive, Dark New Day released their second album, titled "New Tradition", in 2012.  On February 19, 2013, the band released their third album, titled "Hail Mary".

Lucian Grainge: Sir Lucian Charles Grainge, CBE, (born 29 February 1960) is the chairman and chief executive officer of Universal Music Group.  Over the course of his career, he has been instrumental in the careers of artists such as Amy Winehouse, ABBA, Eurythmics, Rihanna, Sam Smith, Take That, Psychedelic Furs, The Rolling Stones, Sting, U2, Jamie Cullum and Andrea Bocelli.  Grainge has worked in the music business for his entire career.  In 2013, 2015, and 2016, he topped Billboard Magazine’s “Power 100” list as the most powerful person in the music business, the only person to ever hold that distinction three times and the first to earn that position for consecutive years.

Benjamin Kowalewicz: Benjamin Kowalewicz ( ; born December 16, 1975, in Montreal, Quebec) is a Canadian singer and the lead singer of the Punk rock band Billy Talent.

Supporting paragraphs: Brett Hestla Benjamin Kowalewicz
Answer: yes