Question: In what year became publicly known that the 67th Unitades States Secretary of States had used her family's private email server for official communications?
Sentence (from "Hillary Clinton email controversy"): Those official communications included over 100 emails which contained classified information at the time they were sent, as well as nearly 2,100 emails which were not marked classified but would retroactively be ranked as classified by the State Department.
Relevant evidence: No