The conversation between human and AI assistant.
[|Human|] What role did barrels of benzol play in the explosion of the Mont-Blanc?
[|AI|] The impact of the SS Mont-Blanc and the SS Imo damaged barrels of benzol which were stored on the deck of the Mont-Blanc.  The damaged barrels leaked vapours which were ignited by sparks which set off a fire.
[|Human|] 
What role did barrels of benzol play in the explosion of the Mont-Blanc?