At what tournament did pete sampras begin his lead?
CREATE TABLE table_23408094_14 (tournament_at_which_lead_began VARCHAR, player VARCHAR)
SELECT tournament_at_which_lead_began FROM table_23408094_14 WHERE player = "Pete Sampras"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23408094_14 (tournament_at_which_lead_began VARCHAR, player VARCHAR) Question: At what tournament did pete sampras begin his lead? [/INST] SELECT tournament_at_which_lead_began FROM table_23408094_14 WHERE player = "Pete Sampras" </s>