How to deal with documents with only 1 clause?

[SYChen123]

Thanks for sharing your wonderful work! I'm adapting your code to run on another dataset, where there are some documents having only 1 clause. If directly running the code, such documents will trigger the error below.

Seems like the code didn't consider such case since the dataset used in the paper doesn't have such data. So I'm wondering how to modify the code to make it compatible with such data.

Thanks!