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

### Instruction:
What is the Took Office Date of the Presidency that Left Office Incumbent?

### Inputs:
table_name: table, columns: ['Presidency', 'President', 'Date of Birth', 'Took office', 'Left office']

### Response:
SELECT SUM Took office FROM table WHERE Left office = incumbent