In this task, you are given a premise sentence. Your task is to write a new sentence by substituting the subject and object (i.e., the input's subject should be output's object and vice versa.). The generated sentence must be fluent and shouldn't change the voice (i.e., passive or active) of the input.

The artists that thanked the judge helped the presidents .
The judge helped the artists .

The banker who admired the lawyers helped the judge .
The judge helped the banker .

The professors contacted the judges .

The judges contacted the professors .