Military radio and oil well: what they have in common

1. Step 1. Military radio — has part — Antenna. It needs an antenna.
2. Step 2. Antenna — is part of — Sputnik 1. Four whip antennas.
3. Step 3. Sputnik 1 — uses — R-7 rocket. Launched by an R-7 rocket.
4. Step 4. R-7 rocket — is made of — Kerosene. The fuel is kerosene.
5. Step 5. Kerosene — is made of — Crude oil. A fraction of crude oil.
6. Step 6. Crude oil — uses — Oil well. Oil is extracted from wells.

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