In this task your given two statements. 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.

[Q]: I knocked on my neighbor's door.
My neighbor invited me in.
[A]: effect


[Q]: The bathroom sink was clogged.
I poured drain cleaner into it.
[A]: effect


[Q]: The seasons changed from summer to autumn.
Leaves fell from the trees.
[A]:
effect