instruction:
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.
question:
Cơ bắp cánh tay của người đàn ông phồng lên.
Anh khoanh tay.
answer:
cause


question:
Tôi thức khuya.
Tôi mệt mỏi vào sáng hôm sau.
answer:
effect


question:
Tôi bật quạt.
Không khí mát mẻ lướt qua tôi.
answer:

effect