Tissue box and cannon: what they have in common

1. Step 1. Tissue box — is part of — Paper tissues. It dispenses tissues one at a time.
2. Step 2. Paper tissues — is made of — Wood pulp. Cellulose.
3. Step 3. Wood pulp — is made of — Cellulose. Wood cellulose.
4. Step 4. Cellulose — is material for — Smokeless powder. Nitrocellulose.
5. Step 5. Smokeless powder — evolved from — Gunpowder. A replacement for black powder.
6. Step 6. Gunpowder — is used in — Cannon. A gunpowder charge.

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