Cannon carriage and aeroplane: what they have in common

1. Step 1. Cannon carriage — is part of — Cannon. A carriage used as a support.
2. Step 2. Cannon — is part of — Ironclad. Artillery.
3. Step 3. Ironclad — evolved into — Aircraft carrier. The first aircraft carriers were converted from battleships and cruisers.
4. Step 4. Aircraft carrier — uses — Aeroplane. Basing aircraft.

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