Funso (Chichewa): Mtengo wotseketa wa Sunbird wam'mbiyomu ndi uti? 
Question (English): What is the previous close of SUNBIRD?
Table: mse_daily (difficulty: easy)
SQL: SELECT previous_close_price, MAX(trade_date) AS max_trade_date FROM mse_daily WHERE ticker = 'SUNBIRD';
Result: [(460.02, '2025-09-10')]