YOU SAID:

i don't know but where did christianity originate?

INTO JAPANESE

わからないけど、キリスト教はどこから来たのか

BACK INTO ENGLISH

I do not know, but where did Christianity come from

INTO JAPANESE

私は知らないが、キリスト教はどこから来たのか

BACK INTO ENGLISH

I do not know, but where did Christianity come from