Funso (Chichewa): Kodi pali kusiyana kotani pakati pa chiwerengero chounikidwa ku Thyolo ndi Neno? 
Question (English): What is the difference between the analyzed populations for Thyolo and Neno
Table: food_insecurity (difficulty: hard)
SQL: SELECT (SELECT DISTINCT analyzed_population FROM food_insecurity WHERE district = 'Thyolo') - (SELECT DISTINCT analyzed_population FROM food_insecurity WHERE district = 'Neno');
Result: [(637757,)]