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

### Instruction:
What was the average mintage for that of artist Celia Godkin, before the year 2010?

### Inputs:
table_name: table, columns: ['Year', 'Artist', 'Composition', 'Mintage', 'Issue Price']

### Response:
SELECT AVG Mintage FROM table WHERE Artist = celia godkin AND Year < 2010