The National is an American rock band from Cincinnati, Ohio, formed in 1999. The band consists of Matt Berninger (vocals), Aaron Dessner (guitar, keyboards), Bryce Dessner (guitar), Scott Devendorf (bass) and Bryan Devendorf (drums). Founded by Berninger, Aaron Dessner, and Scott and Bryan Devendorf, The National released their self-titled debut album, The National (2001), on Brassland Records, an independent record label founded by Dessner and his twin brother, Bryce Dessner. Bryce, who had assisted in recording the album, soon joined the band, participating as a full member in the recording of its follow-up, Sad Songs for Dirty Lovers (2003).

On March 17, 2016 the band announced Day of the Dead, a charity tribute album to the Grateful Dead released by 4AD on May 20, 2016. Day of the Dead was created, curated and produced by Aaron and Bryce. The compilation, which took four years to record, is a wide-ranging tribute to the songwriting and experimentalism of the Dead, and features over 60 artists from varied musical backgrounds. It has 59 tracks and is almost 6 hours long. All profits will help fight for AIDS/ HIV and related health issues around the world through the Red Hot Organization. Day of the Dead is the follow up to 2009's Dark Was The Night (4AD), a 32-track, multi-artist compilation also produced by Aaron and Bryce for Red Hot.  Day of the Dead features collaborations and recordings from a diverse group of artists including Wilco, Flaming Lips, Bruce Hornsby, Justin Vernon, the National, The War on Drugs, Kurt Vile, Lee Renaldo of Sonic Youth, Ira Kaplan of Yo La Tengo, Jenny Lewis, The Tallest Man on Earth, Unknown Mortal Orchestra, Perfume Genius, Jim James of My Morning Jacket, Senegalese collective Orchestra Baobob, composer Terry Riley and his son Gyan Riley, electronic artist Tim Hecker, So Percussion, jazz pianist Vijay Iyer and Bela Fleck.  Of the 59 tracks on the compilation, many feature a house band made up of Aaron, Bryce, brothers Scott and Bryan Devendorf, Josh Kaufman (who co-produced the project), Conrad Doucette (of Takka Takka), Sam Cohen and Walter Martin. The National have three tracks on the album: "Peggy-O", "Morning Dew" and "I Know You Rider".  A Day of the Dead live performance took place in August 2016 at the second annual Eaux Claires Festival (August 12-13) featuring Jenny Lewis, Matthew Houck, Lucius, Will Oldham, Sam Amidon, Richard Reed Parry, Justin Vernon, Bruce Hornsby, So Percussion, Ruban Nielson, and the National.

Using a quote from the above article, answer the following question: Why did they make this album with a group?