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 girl went down the hill on her bike, so it was nice to see her again
not plausible

The terrorist set off the bomb, so it was no big deal
not plausible

The seamstress pushed the threaded needle into the fabric, so I had to stitch it off

not plausible