user: Question: Who is the representative with a presentation of credentials date on February 23, 1854?
Columns: ['Representative', 'Title', 'Presentation of Credentials', 'Termination of Mission', 'Appointed by']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['John Appleton', "Chargé d'Affaires", 'January 3, 1849', 'May 4, 1849', 'James K. Polk']
SQL:

assistant: SELECT "Representative" FROM "Table" WHERE "Presentation of Credentials" = 'February 23, 1854';