YOU SAID:

i went to somebody I know

INTO JAPANESE

私は知っている誰かに行きました

BACK INTO ENGLISH

I went to someone who knows

INTO JAPANESE

私は知っている人に行きました

BACK INTO ENGLISH

I went to the person who knows

INTO JAPANESE

私は知っている人に行きました

BACK INTO ENGLISH

I went to the person who knows