Conversation so far:
what was the depth of brad delp?
On March 9, 2007, lead singer Delp committed suicide at his home in Atkinson, New Hampshire.
Police found him dead in his master bathroom.
why did he kill himself?
CANNOTANSWER.
anything interesting about the article?
A concert in honor of Delp named "Come Together: A Tribute to Brad Delp" occurred on August 19, 2007.
who performed?
Ernie and the Automatics, Beatlejuice, Farrenheit, Extreme, Godsmack, RTZ, Orion the Hunter, and finally the current version of Boston.
why did they perform?
A concert in honor of Delp.

Question: when was the concert?
Self-contained rewrite: When was the concert in honor of Delp?