Motorcycle sidecar body and aeroplane: what they have in common

1. Step 1. Motorcycle sidecar body — is part of — Sidecar motorcycle. A side car with a wheel.
2. Step 2. Sidecar motorcycle — evolved from — Motorcycle. A motorcycle with a sidecar.
3. Step 3. Motorcycle — has part — Pneumatic tyre. Pneumatic tyres on both wheels.
4. Step 4. Pneumatic tyre — is part of — Landing gear. Aircraft tyres.
5. Step 5. Landing gear — is part of — Aeroplane. Landing gear.

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