Spacesuit and oil lamp: what they have in common

1. Step 1. Spacesuit — is used in — Vostok 1. The SK-1 spacesuit.
2. Step 2. Vostok 1 — uses — R-7 rocket. Launched by a version of the R-7.
3. Step 3. R-7 rocket — is made of — Kerosene. The fuel is kerosene.
4. Step 4. Kerosene — is used in — Kerosene lamp. The fuel.
5. Step 5. Kerosene lamp — evolved from — Oil lamp. A development of the oil lamp.

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