Question:  Shackleton is an impact crater is named after Antarctic explorer Ernest Shackleton, a polar explorer who led three British expeditions to where?
Sentence (from "Shackleton (TV serial)"): The cast includes Kevin McNally, Lorcan Cranitch, Embeth Davidtz, Danny Webb, Matt Day and Phoebe Nicholls (also the director's wife) as Lady Shackleton.
Relevant evidence: No