Photoresistor and plough: what they have in common

1. Step 1. Photoresistor — is part of — Street light. Switching on at dusk.
2. Step 2. Street light — is part of — Tunnel. Lighting.
3. Step 3. Tunnel — uses — Chisel. Hezekiah’s Tunnel was cut by hand with chisels.
4. Step 4. Chisel — has part — Handle. A wooden or plastic handle.
5. Step 5. Handle — is part of — Plough. Handles for steering the plough.

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