Question: Children's National Medical Center and Sibley Memorial Hospital, are both located in which US location?
Sentence (from "Medical/Market Center station"): It opened on December 30, 1996 and serves Dallas Market Center and the nearby medical district which includes Parkland Memorial Hospital, Children's Medical Center of Dallas, University of Texas Southwestern Medical Center, St. Paul Medical Center and Zale Lipshy University Hospital.
Relevant evidence: No