Sure, here's a riddle for you:

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Hint: The key to solving this riddle lies in thinking abstractly about what might fit the description provided.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence