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

### Instruction:
What was the Attendance during the Home game where St. Johnstone was the Opponent?

### Inputs:
table_name: table, columns: ['Date', 'Opponent', 'Venue', 'Result (Celtic score first)', 'Attendance', 'Match report']

### Response:
SELECT COUNT Attendance FROM table WHERE Opponent = st. johnstone AND Venue = home