My sentence is true because Henry Kissinger is known to have had this role. There are also many records of evidence that he did in fact have this role from the records of his work.
This justifies what answer for what question? Q & A: 
user
Is the following a factual statement?
"Henry Kissinger worked as a consultant who served as United States Secretary of State and National Security Advisor under the presidential administrations of Richard Nixon and Gerald Ford."
Options:
- yes
- no
yes
assistant