find out (about sth/sb) | ˌfind ˈout sth (about sth/sb)
to get some information about sth/sb by asking, reading, etc. :
She'd been seeing the boy for a while, but didn't want her parents to find out.
I haven't found anything out about him yet.
[+ wh- ]
Can you find out what time the meeting starts?
[+ that ]
We found out later that we had been at the same school.