Example data from the VennMaster package.
organismsA matrix with 7 observations, consisting of various organisms, and 5 variables: animal, mammal, plant, sea, and, spiny, indicating whether the organism belongs to the category or not.
Note that this data is difficult to fit using an Euler diagram, even if we use ellipses, which is clear if one chooses to study the various overlaps in the resulting diagrams.