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

### Instruction:
what's the lowest point with highest point being mount greylock

### Inputs:
table_name: table, columns: ['State', 'Highest point', 'Highest elevation', 'Lowest point', 'Lowest elevation', 'Mean elevation']

### Response:
SELECT Lowest point FROM table WHERE Highest point = Mount Greylock