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.
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Question: entity: rider
before: unskilled
after: skilled
attr: knowledge

Answer: knowledge of rider was unskilled before and skilled afterwards

Question: entity: water
before: clear
after: green
attr: color

Answer: color of water was clear before and green afterwards

Question: entity: lungs
before: exhaling
after: inhaling
attr: volume

Answer:
volume of lungs was exhaling before and inhaling afterwards