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

### Instruction:
What is the highest number of school enrollment for Union Star High School in De Kalb county?

### Inputs:
table_name: table, columns: ['School', 'Team Name', 'Town', 'County', 'School Enrollment (2008–10)', 'Football?']

### Response:
SELECT MAX School Enrollment (2008–10) FROM table WHERE County = de kalb AND School = union star high school