Instructions: 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.
Input: Một cơn lốc xoáy đi qua thị trấn.
Mái của tòa án bị thổi bay.
Output:
effect