Towel and nuclear reactor: what they have in common

1. Step 1. Towel — is made of — Cotton. Cotton.
2. Step 2. Cotton — is material for — Biplane. The covering is fabric.
3. Step 3. Biplane — has part — Propeller. A tractor propeller.
4. Step 4. Propeller — is part of — Nuclear icebreaker. Propellers.
5. Step 5. Nuclear icebreaker — has part — Nuclear reactor. A reactor plant.

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