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

### Instruction:
What is the highest stage number for a year later than 1948, leader at the summit was group, and finish was Bagnères-De-Bigorre?

### Inputs:
table_name: table, columns: ['Year', 'Stage', 'Start', 'Finish', 'Leader at the summit']

### Response:
SELECT MAX Stage FROM table WHERE Year > 1948 AND Leader at the summit = group AND Finish = bagnères-de-bigorre