Clinical thermometer and knife: what they have in common

1. Step 1. Clinical thermometer — is a kind of — Thermometer. A thermometer.
2. Step 2. Thermometer — is part of — Weather station. A thermometer.
3. Step 3. Weather station — has part — Rain gauge. A rain gauge.
4. Step 4. Rain gauge — is made of — Bronze. Korean rain gauges (1441) are bronze.
5. Step 5. Bronze — is material for — Cutlery. Ancient spoons and knives were bronze.
6. Step 6. Cutlery — has part — Knife. Knives.

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