YOU SAID:

We dont know who is still alive

INTO JAPANESE

人がまだ生きているかわかりません

BACK INTO ENGLISH

I do not know who is still alive?

INTO JAPANESE

人はまだ生きているのかわからない?

BACK INTO ENGLISH

I don't know who is still alive?

INTO JAPANESE

私は人がまだ生きているとは知らないか。

BACK INTO ENGLISH

And people still alive I don't know.

INTO JAPANESE

知らない人まだ生きています。

BACK INTO ENGLISH

Do not know who is still alive.

INTO JAPANESE

人がまだ生きているか分からない。

BACK INTO ENGLISH

Do not know who is still alive.