Carpet sweeper and elevator: what they have in common

1. Step 1. Carpet sweeper — is made of — Plant fibre. The brush is bristle.
2. Step 2. Plant fibre — is material for — Rope. Rope is twisted from plant fibres.
3. Step 3. Rope — is used in — Pulley. A rope runs over the pulley.
4. Step 4. Pulley — is part of — Elevator. The rope runs over a pulley.

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