Foam midsole and electrical grid: what they have in common

1. Step 1. Foam midsole — is part of — Trainers. Cushioning foam.
2. Step 2. Trainers — is made of — Vulcanized rubber. The sole.
3. Step 3. Vulcanized rubber — is material for — Pneumatic tyre. A tyre is made of vulcanized rubber.
4. Step 4. Pneumatic tyre — is part of — Electric car. An electric car’s wheels have pneumatic tyres.
5. Step 5. Electric car — uses — Charging station. It charges at charging stations.
6. Step 6. Charging station — uses — Electrical grid. Powered from the grid.

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