Antenna and gas lamp: what they have in common

1. Step 1. Antenna — is part of — Television set. An antenna.
2. Step 2. Television set — has part — Remote control. A remote control.
3. Step 3. Remote control — has part — LED. An infrared LED.
4. Step 4. LED — is part of — Street light. LEDs.
5. Step 5. Street light — evolved from — Gas lamp. Gas lamps.

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