user: Question: which Construction is named Heng-hai?
Columns: ['Name (pinyin)', 'Name (Wade Giles)', 'Characters', 'Type', 'Construction']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Fuxing', 'Fu-hsing', '福星', 'wooden gunboat', '1870, Foochow Navy Yard']
SQL:

assistant: SELECT "Construction" FROM "Table" WHERE "Name (Wade Giles)" = 'Heng-hai';