Social network and transformer: what they have in common

1. Step 1. Social network — uses — World Wide Web. It runs on the web.
2. Step 2. World Wide Web — is used in — Search engine. It indexes the web.
3. Step 3. Search engine — uses — Data centre. It runs in data centres.
4. Step 4. Data centre — uses — Electrical grid. Power.
5. Step 5. Electrical grid — has part — Transformer. Transformer substations.

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