Hi All! 

I am attempting to compare items in a list to a master list from within an Activity. In said Activity I loop over a page list from Class A. Then for each page in the page list I loop over another list from Class B. Finally, I compare each page in the Class B page list to a page list from Class C. I am looking to see if the page from Class B already exists as a page in Class C. I feel that this would best be accomplished with a When rule; however, I am unsure as to where to run the When rule. I don't know which class to put the When rule in. Do you think I should add anything to the Pages & Classes tab? Any ideas or advice would be appreciated.