Conversation so far:
When did Steve Irwin die?
4 September 2006.
Where did he die?
Batt Reef, near Port Douglas, Queensland.
How did he die?
stingray's barb pierced his heart, causing him to bleed to death.

Question: Was he alone when it happened?
Self-contained rewrite: Was Steve Irwin alone when a stingray's barb pierced his heart, causing him to bleed to death?