Gummed adhesive back and zip: what they have in common

1. Step 1. Gummed adhesive back — is part of — Postage stamp. Gum on the back.
2. Step 2. Postage stamp — is made of — Paper. Paper.
3. Step 3. Paper — is material for — Paper money. Paper.
4. Step 4. Paper money — is used in — Wallet. It holds money.
5. Step 5. Wallet — has part — Zip. A zipped coin compartment.

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