Attitude indicator and steam locomotive: what they have in common

1. Step 1. Attitude indicator — is part of — Cockpit. An attitude indicator.
2. Step 2. Cockpit — is part of — Aeroplane. A cockpit.
3. Step 3. Aeroplane — includes — Wright Flyer. The first aeroplane.
4. Step 4. Wright Flyer — uses — Railway track. The Flyer had no wheels: it took off along a wooden rail.
5. Step 5. Railway track — is used in — Steam locomotive. It runs on rails.

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