1. An information processing system comprising: a processor for determining one or more candidate tags based on input data, the candidate tags being included within a hierarchical structure; and a display for displaying the candidate tags in a manner indicative of the candidate tags' positions in the hierarchical structure, wherein the input data represents a photographic image of one or more objects such that the processor determines the one or more candidate tags included within the hierarchical structure which correspond to the one or more objects based on the photographic image, and wherein when a respective photographic image has a first object and a second object, the processor is configured to (i) detect a first process target area for the first object and detect a second process target area for the second object, (ii) determine a first candidate tag for the first process target area by utilizing a first procedure, and (iii) determine a second candidate tag for the second process target area by utilizing a second procedure which is different from the first procedure, in which one of the first procedure or the second procedure involves integrally determining results of a plurality of processing methods and selecting the respective candidate tag therefrom, wherein each processing method is individually capable of identifying a candidate tag and each said processing method is different from each other.