According to the San Francisco newspaper, the rocker passed away on Thursday, January 28th of multiple organ failure and septic shock, following suffering a heart attack earlier this week. Over recent years, he had been suffering from quite a few health problems, including another heart attack earlier in March of 2015.
Kantner helped found Jefferson Airplane in 1965, and is considered to be legendary in the San Francisco music scene beginning in the mid '60s, especially with with songs like "Somebody to Love" and "White Rabbit."
Our hearts go out to Paul's family and friends.
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