Index card and bicycle: what they have in common

1. Step 1. Index card — is made of — Paper. Paper.
2. Step 2. Paper — is material for — Billboard. The poster is paper.
3. Step 3. Billboard — has part — LED. LED screens.
4. Step 4. LED — is part of — Bike light with dynamo. An LED.
5. Step 5. Bike light with dynamo — is part of — Bicycle. A lamp.

Open Evothings