YOU SAID:
The cat is pink and we don't know why!
INTO JAPANESE
猫はピンク色で、理由はわかりません!
BACK INTO ENGLISH
The cat is pink and I don't know why!
INTO JAPANESE
その猫はピンク色で、なぜかわかりません!
BACK INTO ENGLISH
The cat is pink and I don't know why!
You've done this before, haven't you.