In how many districts was the incumbent Estes Kefauver? 
CREATE TABLE table_1342270_42 (district VARCHAR, incumbent VARCHAR)
SELECT COUNT(district) FROM table_1342270_42 WHERE incumbent = "Estes Kefauver"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1342270_42 (district VARCHAR, incumbent VARCHAR) Question: In how many districts was the incumbent Estes Kefauver?  [/INST] SELECT COUNT(district) FROM table_1342270_42 WHERE incumbent = "Estes Kefauver" </s>