user: Question: What was the opponent for the game at Multi-Sport Field?
Columns: ['Date', 'Opponent', 'Home/Away', 'Field', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['May 19', 'Cannons', 'Away', 'Harvard Stadium', 'W 13-9']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Field" = 'Multi-Sport Field';