Conversation so far:
When did The Beach Boys' Carl Wilson die?
Carl Wilson died on February 6, 1998.
Where did The Beach Boys' Carl Wilson die?
Carl Wilson died in Los Angeles.
What did The Beach Boys' Carl Wilson achieve before death?
Despite his lung cancer diagnosis, Carl Wilson continued to perform while undergoing chemotherapy.

Question: What was the course of his death?
Self-contained rewrite: What was the course of The Beach Boys' Carl Wilson death?