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.
did anyone act as a witness for Gretchen Carlson in her lawsuit?
After Gretchen Carlson came forward, six more women spoke to Gabriel Sherman of New York magazine, alleging that Roger Ailes had sexually harassed them.
which six women also accused Roger Ailes of sexual harassment?
Kellie Boyle says Roger Ailes propositioned her in 1989, shortly after he helped George H.W. Bush become president. Marsha Callahan says Ailes harassed her in the late ’60s.

Question: how long did the lawsuit go on?
Self-contained rewrite: how long did Gretchen Carlson's sexual harassment lawsuit go on?