How do I Spawn sprite at random sprite from family?

OK i have a family with just 1 sprite in it (spawner).
How do i spawn enemy sprite at random spawner instance ?
I have looked everywhere and cand find how to do it. help ?

System Pick Nth Instance of Family

Use the expression floor(random(family.count)

nvm

System Pick Nth Instance of Family

Use the expression floor(random(family.count)

Thx a lot. that worked like a charm.