how to compare two coloumns of a table

I have a table which contains two columns document and sentences . Using sentence extractor, sentence column has been derived through document column . In which the sentence column contains the rows of document and sentences in each row of document .I don’t want document rows in sentence column so how to compare these to columns and remove the common rows
sentences.knwf (4.9 KB)

Hi @shivanisrivarshini -

It looks like perhaps your issue was addressed in this thread in the Text Processing subforum:

Is that correct? If so, I can close this topic as a duplicate.

Yup sure My issue has been addressed and this is duplicate question You can Close
I dont know How to close the question