YOU SAID:
The only concert I attended is his concert.
INTO JAPANESE
私が参加した唯一のコンサートは彼のコンサートです。
BACK INTO ENGLISH
The only concert I attended is his concert.
INTO JAPANESE
私が参加した唯一のコンサートは彼のコンサートです。
BACK INTO ENGLISH
The only concert I attended is his concert.
That didn't even make that much sense in English.