In this task, you will be given two sentences separated by ", so". You should decide whether the first sentence can be the cause of the second sentence. If you can see a possible causation, answer with "plausible", otherwise answer with "not plausible".

[Q]: I pushed the pendulum, so it swung back and forth
[A]: plausible


[Q]: The surfer caught the wave, so it wasn't a problem at all
[A]: not plausible


[Q]: The tenant misplaced his keys to his apartment, so he couldn't get back to him
[A]:
plausible