Definition: 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".

Positive Example 1 -
Input: The woman went to the bank, so pigs can fly.
Output: not plausible

Positive Example 2 -
Input: The women went to the bank, so now she has money on hand.
Output: plausible

Negative Example 1 -
Input: The woman went to the bank, so she waited in a line.
Output: not plausible

Negative Example 2 -
Input: The physician misdiagnosed the patient, so he went to the vet
Output: plausible

Now complete the following example -
Input: It got dark outside, so we had to go downstairs
Output: 


Output: plausible