user: Question: If the Plain stop is ㄷ, what is the Non- stop?
Columns: ['Articulatory class', 'Non- stop', 'Plain stop', 'Aspirated stop', '"Muddy" voice']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['牙音 "molar sounds"', '(ㆁ)', 'ㄱ', 'ㅋ', 'ㄲ']
SQL:

assistant: SELECT "Non- stop" FROM "Table" WHERE "Plain stop" = 'ㄷ';