How many providers were founded in 1964?
CREATE TABLE table_11390711_4 (provider_iai_ VARCHAR, foundation VARCHAR)
SELECT COUNT(provider_iai_) FROM table_11390711_4 WHERE foundation = 1964
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_11390711_4 (provider_iai_ VARCHAR, foundation VARCHAR) Question: How many providers were founded in 1964? [/INST] SELECT COUNT(provider_iai_) FROM table_11390711_4 WHERE foundation = 1964 </s>