| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | coal | United Kingdom | Historically important as a primary source of energy for industrial revolution and power generation | 1 |
| 2 | coal | United Kingdom | Used as a major source of energy and heat production | 1 |
| 3 | piece of coal | United Kingdom | Used for heating and power generation in colder regions | 1 |