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: heart rate 
before: high 
after: low 
attr: intensity
intensity of heart rate was high before and low afterwards

entity: grid 
before: vacant 
after: full 
attr: volume
volume of grid was vacant before and full afterwards

entity: ground 
before: flat 
after: full of holes 
attr: texture

texture of ground was flat before and full of holes afterwards

