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 Input:
entity: worsted
before: on one side of post
after: on opposite side of post
attr: location

Ex Output:
location of worsted was on one side of the post before and on opposite side of the post afterwards

Ex Input:
entity: years of experience
before: unknown
after: known
attr: knowledge

Ex Output:
knowledge of years of experience was unknown before and known afterwards

Ex Input:
entity: levels
before: incomplete
after: completed
attr: state

Ex Output:
state of levels was incomplete before and completed afterwards