+---+                 +---+
     r | O--------+  +---------O | s
       +---+      |  |       +---+
                  |  |
                  V  V
               +--------+
        name   |      O--------+
               +--------+      |
        gender |  'F'   |      V
               +--------+   +--------+
        age    |   11   |   | "Jane" |
               +--------+   +--------+