user: ### NOW ANSWER:
Question: Who were they playing when Bird (1-4) had a loss?
Columns: ['Date', 'Opponent', 'Site', 'Score', 'Loss']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Tuesday, April 6', '@ San Diego Padres', 'Jack Murphy Stadium', 'W, 1-0', 'Eichelberger (0-1)']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Loss" = 'Bird (1-4)';