Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_23408094_14 (span_of_years_led INTEGER, tournament_at_which_lead_began VARCHAR)
### Question:
Of the players whose lead began at the australian championships, what was the shortest span of years led?
### Answer:
SELECT MIN(span_of_years_led) FROM table_23408094_14 WHERE tournament_at_which_lead_began = "Australian Championships"