Saucepan and headphones: what they have in common

1. Step 1. Saucepan — is made of — Stainless steel. Stainless steel.
2. Step 2. Stainless steel — is material for — Flight recorder. Stainless steel.
3. Step 3. Flight recorder — has part — Flash memory. Memory.
4. Step 4. Flash memory — is part of — MP3 player. Flash memory.
5. Step 5. MP3 player — has part — Headphones. Headphones.

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