Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Antonio is a boy who eats a lot and his weight is 50 kilograms. Antonio's sister, who is an athlete, weighs 12 kilograms less than him. How much do the two siblings weigh together?

### Response:
The weight of Antonio's sister is 50 kilograms - 12 kilograms = <<50-12=38>>38 kilograms.
So the two siblings weigh 50 kilograms + 38 kilograms = <<50+38=88>>88 kilograms combined.
#### 88