question: pen:write
choices.label: A B C D
choices.text: rice:cultivation commodity:production oil lamp:lighting courier station:message
explanation: a "pen" is a tool used to "write". "rice" will be "cultivated", and "cultivation" is not a tool for growing "rice". "commodities" will be "produced", and "production" is not a tool for "commodities". an "oil lamp" is a tool used for "lighting". the "courier station" was a place for officials who passed military intelligence to board and change horses on the way, rather than a tool.
relation: pen write R3.8
relation: cultivation rice R4.2
relation: production commodity R4.2
relation: oil lamp lighting R3.8