Accelerometer and oil well: what they have in common

1. Step 1. Accelerometer — is part of — Airbag. The crash sensor is an accelerometer.
2. Step 2. Airbag — is made of — Nylon. The airbag is nylon.
3. Step 3. Nylon — is made of — Crude oil. The raw material is petrochemical.
4. Step 4. Crude oil — uses — Oil well. Oil is extracted from wells.

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