Instructions: In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Input: A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Of over 90,000 places listed on the country's National Register of Historic Places, only some 2,500 are recognized as National Historic Landmarks. Question: Which National Historic Landmarkin Oberlin, Ohio was also home to the first African American that was elected to a United States Public Office? Answer: John Mercer Langston House
Output:
A National Historic Landmark NHL is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance.