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 felt dizzy, so she took him to the doctor
not plausible

The clock stopped ticking, so we had to act fast
plausible

I held the door for the woman entering behind me, so I could look at her

plausible