The conversation between human and AI assistant.
[|Human|] Summarize the following story in 1 sentence: "John had been running his neighborhood store for 20 years, but due to the falling demand he had to close it down."
[|AI|] John shut down his neighborhood store after 20 years of operation due to declining demand.
[|Human|] 
Summarize the following story in 1 sentence: "John had been running his neighborhood store for 20 years, but due to the falling demand he had to close it down."