Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which Stadium has a City of panama city, and a Group of group a, and a 2009 season of 1st in lna (champion)?

### Inputs:
table_name: table, columns: ['Club', 'City', 'Stadium', '2009 season', 'Group']

### Response:
SELECT Stadium FROM table WHERE City = panama city AND Group = group a AND 2009 season = 1st in lna (champion)