"The queen and the prince go to Japan."
Translation:Sang ratu serta sang pangeran pergi ke Jepang.
Because it would be confusing for a beginner to learn. "okay so dan is translated to and, but you can also use serta as and in some cases." They've done this multiple times on purpose because by the time you are half way through the course you have probably realized there are multiple ways to say the same thing and its not going to confuse you as much as a newbie. :)