user: Question: Who lost that has a score of W 4-3?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Crowd', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Jun 1', 'BAL', 'W 14-2', 'McGregor', '47,252', '38-9']
SQL:

assistant: SELECT "Loss" FROM "Table" WHERE "Score" = 'W 4-3';