Conversation so far:
who was Gretchen Carlson's sexual harassment lawsuit against?
Gretchen Carlson filed a sexual harassment lawsuit against Fox News chairman Roger Ailes.
what year was Gretchen Carlson's sexual harassment lawsuit?
On July 6, 2016, Gretchen Carlson filed a sexual harassment lawsuit.

Question: did anyone act as a witness for her?
Self-contained rewrite: did anyone act as a witness for Gretchen Carlson in her lawsuit?