What is the number of stages where the teams classification leader is Cervélo Testteam?
CREATE TABLE table_26010857_13 (stage VARCHAR, teams_classification VARCHAR)
SELECT COUNT(stage) FROM table_26010857_13 WHERE teams_classification = "Cervélo TestTeam"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26010857_13 (stage VARCHAR, teams_classification VARCHAR) Question: What is the number of stages where the teams classification leader is Cervélo Testteam? [/INST] SELECT COUNT(stage) FROM table_26010857_13 WHERE teams_classification = "Cervélo TestTeam" </s>