You are given a sentence in Galician. Your job is to translate the Galician sentence into English.

No seu libro falou dos animais sociais.
And in his book, he talked about the social animals.

Numero cinco: Se non saben, digan que non saben.
Number five: If you don't know, say that you don't know.

E no mundo xa se tenen dado estes dous casos.
And the world has gone through this where it paid attention and then didn't pay attention.