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: baking powder and cream of tartar
before: separate
after: mixed
attr: composition

Ex Output:
composition of baking powder and cream of tartar was separate before and mixed afterwards

Ex Input:
entity: saucepan
before: empty
after: contains ingredients
attr: state

Ex Output:
state of saucepan was empty before and contains ingredients afterwards

Ex Input:
entity: bottle
before: empty
after: full
attr: volume

Ex Output:
volume of bottle was empty before, and full afterwards.