You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are given a sentence in English. Your job is to translate the English sentence into Japanese.

And it was primarily because Kiribati realized that this was in their own self-interest to do this.
Solution: 第一にキリバス共和国が彼ら自身の利益になると理解したからです
Why? The English sentence is correctly translated into Japanese. Kiribati is correctly translated as キリバス.

New input: Seriously.
Solution:
真面目な話