MRI and bell: what they have in common

1. Step 1. MRI — has part — Superconducting magnet. A superconducting magnet.
2. Step 2. Superconducting magnet — is a kind of — Electromagnet. An electromagnet.
3. Step 3. Electromagnet — is part of — Electric bell. An electromagnet strikes a small hammer.
4. Step 4. Electric bell — is part of — Alarm clock. A bell.
5. Step 5. Alarm clock — has part — Bell. A bell rings.

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