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

### Instruction:
How many people were in attendance when the visiting team was the Nuggets and the leading scorer was J.R. Smith (28)?

### Inputs:
table_name: table, columns: ['Date', 'Visitor', 'Score', 'Home', 'Leading scorer', 'Attendance', 'Record']

### Response:
SELECT SUM Attendance FROM table WHERE Visitor = nuggets AND Leading scorer = j.r. smith (28)