Hello Tony, 

You are right, the shortest formulation for lease in this context is the 
one you wrote: get a task and then run it. There are still some other 
important elements to this: leasing a task makes it unavailable for 
processing by another worker, and it remains unavailable until the lease 
expires. This is an important aspect: no other worker has access to the 
task that was leased, not until this lease expires. It follows, as 
expected, that once a worker completes a task, it needs to delete the task 
from the queue. 

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