Freebase MQL query - Get data by a social link

Freebase MQL query - Get data by a social link

I'm having a hard time trying to get data about a person from Freebase
using his social link - by a MQL query.
How could this be done?
Something like:
https://www.googleapis.com/freebase/v1/mqlread?query={
"*":[{}],
"/common/topic/social_media_presence":[{
"name":"http://twitter.com/JustinBieber",
}]
}