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".

The pond froze over for the winter, so we had to clean it
not plausible

Several witnesses of the crime testified against the suspect, so he's got that going for him
not plausible

I tossed the ball upwards, so I could see the front

not plausible