Given an entity, a before event, an after event, and an attribute related to the entity, generate a sentence as output. Your sentence should show the changes in the attribute of the entity.

[EX Q]: entity: mug 
before: clean 
after: greasy 
attr: state
[EX A]: state of mug was clean before and greasy afterwards

[EX Q]: entity: desk 
before: measured 
after: tall enough for ball 
attr: knowledge
[EX A]: knowledge of desk was measured before and tall enough for the ball afterwards

[EX Q]: entity: joints 
before: bare 
after: covered 
attr: covering
[EX A]:
covering of joints was bare before and covered afterwards

