Definition: You are given a sentence in Japanese. Your job is to translate the Japanese sentence into Portugese.
Input: 私たちは夜明け前にカラチを出発したとき
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
E nós partimos de Karachi uma madrugada antes do amanhecer.