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.

[Q]: entity: board
before: waxed
after: bare
attr: composition
[A]: composition of board was waxed before and bare afterwards

[Q]: entity: heart rate
before: high
after: low
attr: intensity
[A]: intensity of heart rate was high before and low afterwards

[Q]: entity: person
before: drowning
after: signaling for help
attr: person
[A]:
person of person was drowning before and signaling for help afterwards