You can also perform a test. Take some of the material and add enough water to it to make it seem like you are making bread.

VOA: special.2009.09.14

Even if you cannot do mouth-to-mouth rescue breathing, you can perform hands-only CPR.

VOA: special.2009.08.11

If a person's heart stops, would you know how to perform CPR?

VOA: special.2009.05.20

You can see cats perform tricks.

VOA: special.2010.03.22