Question: "what is the first period in time mentioned?"  Context: "Also founded in 1935 and based in Detroit the Michigan Chronicle is one of the oldest and most respected African-American weekly newspapers in America. Covering politics, entertainment, sports and community events. The Detroit television market is the 11th largest in the United States; according to estimates that do not include audiences located in large areas of Ontario, Canada (Windsor and its surrounding area on broadcast and cable TV, as well as several other cable markets in Ontario, such as the city of Ottawa) which receive and watch Detroit television stations."  Answer:
The answer to this question is:
1935