user: Question: When has a Korean name ² of 청명 (清明) cheongmyeong?
Columns: ['Longi- tude', 'Usual translation', 'Chinese name ¹', 'Japanese name', 'Korean name ²', 'Vietnamese name', 'Date ³']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['315°', 'start of spring', '立春 lìchūn', '立春 risshun', '입춘 (立春) ipchun', 'Lập xuân', 'Feb 4']
SQL:

assistant: SELECT "Date ³" FROM "Table" WHERE "Korean name ²" = '청명 (清明) cheongmyeong';