Insole and cannon: what they have in common

1. Step 1. Insole — is part of — Footwear. An inner lining.
2. Step 2. Footwear — is made of — Vulcanized rubber. A rubber sole.
3. Step 3. Vulcanized rubber — is material for — Road wheel. With a rubber tyre.
4. Step 4. Road wheel — is part of — Continuous track. Road wheels roll along the track and carry the vehicle’s weight.
5. Step 5. Continuous track — is part of — Infantry fighting vehicle. Tracks.
6. Step 6. Infantry fighting vehicle — has part — Cannon. An autocannon.

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