
                  y: [
                    new Date(1789, 3, 21).getTime(),
                    new Date(1797, 2, 4).getTime()
                  ]
                }
              ]
            },
            // Thomas Jefferson
            {
              name: 'Thomas Jefferson',
              data: [
                {
                  x: 'President',
                  y: [
                    new Date(1801, 2, 4).getTime(),
                    new Date(1809, 2, 4).getTime()
                  ]
         