Question: Non-Stop starred the English actress best known for what role in Downton Abbey?
Sentence (from "Michelle Dockery"): She is most widely known for her performance as Lady Mary Crawley in the ITV (UK) and PBS (U.S.) television period drama series "Downton Abbey" (2010–15), for which she was nominated for three consecutive Emmy Awards in the category for Outstanding Lead Actress In Drama Series, and a Golden Globe Award nomination.
Relevant evidence: Yes