Portal crane and r-7 rocket: what they have in common

1. Step 1. Portal crane — has part — Wire rope. The load hangs on steel cables.
2. Step 2. Wire rope — evolved from — Rope. A steel counterpart of rope.
3. Step 3. Rope — is part of — Parachute. The lines are ropes.
4. Step 4. Parachute — is part of — Soyuz. Landing by parachute.
5. Step 5. Soyuz — evolved from — R-7 rocket. The Soyuz rocket belongs to the R-7 family.

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