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

### Instruction:
Which Year completed has a Dam type of earthfill embankment, and a Dam constructed of khancoban dam?

### Inputs:
table_name: table, columns: ['Dam constructed', 'Year completed', 'Impounded body of water', 'Reservoir capacity', 'Dam wall height', 'Dam type']

### Response:
SELECT MAX Year completed FROM table WHERE Dam type = earthfill embankment AND Dam constructed = khancoban dam