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.

entity: attention
before: focused on pump voltage
after: focused on ground of pump
attr: focus
focus of attention was focused on the pump voltage before and focused on the ground of the pump afterwards

entity: balls
before: bare
after: covered
attr: state
state of balls was bare before and covered afterwards

entity: fabric
before: one piece
after: cut into two pieces
attr: shape
shape of fabric was one piece before and cut into two pieces afterwards