Reverse engineer the given sentence to create a task that could lead to this output.
The coffee mug was empty.
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.
Complete the following task based on the instruction and optional input provided.### Instruction:
Reverse engineer the given sentence to create a task that could lead to this output.

### Input:
The coffee mug was empty.

### Output:
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.