When zachary sanders is the performer how many first aired are there?
CREATE TABLE table_191105_2 (first_aired VARCHAR, performed_by VARCHAR)
SELECT COUNT(first_aired) FROM table_191105_2 WHERE performed_by = "Zachary Sanders"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_191105_2 (first_aired VARCHAR, performed_by VARCHAR) Question: When zachary sanders is the performer how many first aired are there? [/INST] SELECT COUNT(first_aired) FROM table_191105_2 WHERE performed_by = "Zachary Sanders" </s>