Electric scooter and bell: what they have in common

1. Step 1. Electric scooter — has part — Lithium-ion battery. A lithium-ion battery.
2. Step 2. Lithium-ion battery — is part of — Laptop. A battery.
3. Step 3. Laptop — has part — Keyboard. The keyboard is built into the laptop's case.
4. Step 4. Keyboard — is part of — Carillon. A keyboard.
5. Step 5. Carillon — has part — Bell. Bells.

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