Funso (Chichewa): Tchulani nthawi zodziwika bwino zomwe zinalembedwa ku Machinga
Question (English): List distinct time periods recorded for Machinga.
Table: food_insecurity (difficulty: easy)
SQL: SELECT DISTINCT time_period FROM food_insecurity WHERE district = 'Machinga';
Result: [('October 2024-March 2025',), ('May-Sept 2024',)]