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: base
before: thicker
after: thinner
attr: thickness
[EX A]: thickness of base was thicker before and thinner afterwards

[EX Q]: entity: glue
before: on car
after: removed
attr: availability
[EX A]: availability of glue was on car before and removed afterwards

[EX Q]: entity: price
before: unknown
after: known
attr: knowledge
[EX A]:
knowledge of price was unknown before and known afterwards