Depending on your tribe board, some raw resources may be processed into two different resources. The possibilities vary, but raw tlön is a good example, because it may be processed this way by all tribes.

If you have more than one piece of raw tlön on your tribe board, you may process some of them into edible roasted tlön, and process the others into poisonous tlön brew, but you need two tribers placed on the corresponding space on the main board.