Bow and arrow and data centre: what they have in common

1. Step 1. Bow and arrow — has part — Rope. The bowstring is a cord of sinew or fibre.
2. Step 2. Rope — evolved into — Wire rope. A steel counterpart of rope.
3. Step 3. Wire rope — is part of — Cable-stayed bridge. Stay cables.
4. Step 4. Cable-stayed bridge — is made of — Concrete. The pylons are concrete.
5. Step 5. Concrete — is material for — Data centre. The building is concrete.

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