Classify each country as "African" or "European": Nigeria, Rwanda, Portugal, Romania, Ghana, Ukraine
Nigeria: African
Rwanda: African
Portugal: European
Romania: European
Ghana: African
Ukraine: European
### Instruction: Classify each country as "African" or "European": Nigeria, Rwanda, Portugal, Romania, Ghana, Ukraine
### Context: 
### Answer: Nigeria: African
Rwanda: African
Portugal: European
Romania: European
Ghana: African
Ukraine: European</s>