user: Question: Which district was established in 1942?
Columns: ['College or Campus Name', 'Location', 'District', 'Affiliation', 'Estd', 'Weblink']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Anna University - Tiruchirappalli Campus', 'Tiruchirappalli', 'Tiruchirappalli district', 'Anna University', 1952.0, 'http://www.annauniv.edu']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "Estd" = 1942.0;