(3) testing data produced by the system.
Testing data is made/produced by the system.
Testing is not produced by the system.
After the latest crisis started, I read up on the history of the region using encyclopedias.
Four people are getting drinks at a bar.
A vehicle is being cleaned by a women.
A veteran is showing his things from a war.
People wait outside in a busy downtown area.
A woman in a black coat is pushing a stroller through the park.