The conversation between human and AI assistant.
[|Human|] Reverse engineer the given sentence to create a task that could lead to this output.
[|AI|] One possible task that could lead to the output "The coffee mug was empty" could be: 
Observe the state of the coffee mug and report whether it is empty or not.
[|Human|] 
Reverse engineer the given sentence to create a task that could lead to this output.