Catalytic converter and telescope: what they have in common

1. Step 1. Catalytic converter — is part of — Car. Modern cars have a catalytic converter.
2. Step 2. Car — has part — Rear-view mirror. Mirrors.
3. Step 3. Rear-view mirror — is a kind of — Mirror. A mirror.
4. Step 4. Mirror — is part of — Reflecting telescope. The primary mirror.
5. Step 5. Reflecting telescope — is a kind of — Telescope. A telescope.

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