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

### Instruction:
How many species does the sternidae family have worldwide with less than 9 species on Réunion?

### Inputs:
table_name: table, columns: ['Species', 'Order', 'Family', 'Species worldwide', 'Species on Réunion']

### Response:
SELECT COUNT Species worldwide FROM table WHERE Family = sternidae AND Species on Réunion < 9