In this task your given two statements in Vietnamese. You must judge whether the second sentence is the cause or effect of the first one. Label the instances as "cause" or "effect" based on your judgment. The sentences are separated by a newline character.
Example: Các mặt hàng đã được đóng gói trong bọc bong bóng.
Nó dễ vỡ.
Example solution: cause
Example explanation: The object being delicate is the cause of wrapping it in bubble wrap.

Problem: Tôi khoan một cái lỗ trên tường.
Bụi bay ra khỏi lỗ.

Solution: effect