Trampoline and saw: what they have in common

1. Step 1. Trampoline — is made of — Cotton. The bed is canvas.
2. Step 2. Cotton — is used in — Arkwright’s water frame. It spins cotton.
3. Step 3. Arkwright’s water frame — has part — Water wheel. Driven by water.
4. Step 4. Water wheel — is part of — Sawmill. Early sawmills were driven by water wheels.
5. Step 5. Sawmill — uses — Saw. The cutting tool is a saw.

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