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.

[EX Q]: The senators called the actors who the banker helped .
[EX A]: The banker called the senators .

[EX Q]: The scientist contacted the senator .
[EX A]: The senator contacted the scientist .

[EX Q]: The professors advised the bankers that contacted the tourists .
[EX A]:
The tourists advised the professors .