YOU SAID:

Any friend of Diane's is a friend of mine.

INTO JAPANESE

ダイアンのすべての友人は、私の友人です。

BACK INTO ENGLISH

All friends of Diane is a friend of mine.

INTO JAPANESE

ダイアンのすべての友人は、私の友人です。

BACK INTO ENGLISH

All friends of Diane is a friend of mine.