user: Question: On what date is there an assist/pass by Shannon Boxx?
Columns: ['Date', 'Location', 'Lineup', 'Assist/pass', 'Score', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2007-04-14', 'Foxboro MA', "on 8' ( off Lilly )", "Heather O'Reilly", '5-0', '5-0', 'Friendly']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Assist/pass" = 'Shannon Boxx';