Joint replacement and electrical grid: what they have in common

1. Step 1. Joint replacement — is made of — Titanium. A titanium stem.
2. Step 2. Titanium — is material for — Implantable defibrillator. The case is titanium.
3. Step 3. Implantable defibrillator — evolved from — Defibrillator. An implantable one.
4. Step 4. Defibrillator — has part — Transformer. Stepping up the voltage.
5. Step 5. Transformer — is part of — Electrical grid. Transformer substations.

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