The following information must be communicated in a general newspaper article: "Most living animal species belong to the infrakingdom Bilateria, a highly proliferative clade whose members have a bilaterally symmetric body plan. The vast majority belong to two large superphyla: the protostomes, which include organisms such as the arthropods, mollusks, flatworms, annelids, and nematodes; and the deuterostomes, which include the echinoderms, hemichordates, and chordates, the latter of which contains the vertebrates." Which of the following types of graphs should the editor use to best present this information and show the hierarchical relationships and overlap between the different organism groups?