5.1 Dolphins-dl-left

Code
graph TD;
    N1["Gills"];
    N2["Beak"];
    N3["Length"];
    N4["Teeth"];
    N5["Length"];

    N1 -- "=yes" --> L1["+ve: 0\n -ve: 4"];
    N1 -- "=no" --> N2;
    N2 -- "=no" --> L2["+ve: 0\n -ve: 0"];
    N2 -- "=yes" --> N3;
    N3 -- "≠[3,5]" --> L3["+ve: 1\n -ve: 1"];
    N3 -- "=[3,5]" --> N4;
    N4 -- "=many" --> L4["+ve: 2\n -ve: 0"];
    N4 -- "=few" --> N5;
    N5 -- "=3" --> L6["+ve: 1\n -ve: 0"];
    N5 -- "=5" --> L5["+ve: 1\n -ve: 0"];
graph TD;
    N1["Gills"];
    N2["Beak"];
    N3["Length"];
    N4["Teeth"];
    N5["Length"];

    N1 -- "=yes" --> L1["+ve: 0\n -ve: 4"];
    N1 -- "=no" --> N2;
    N2 -- "=no" --> L2["+ve: 0\n -ve: 0"];
    N2 -- "=yes" --> N3;
    N3 -- "≠[3,5]" --> L3["+ve: 1\n -ve: 1"];
    N3 -- "=[3,5]" --> N4;
    N4 -- "=many" --> L4["+ve: 2\n -ve: 0"];
    N4 -- "=few" --> N5;
    N5 -- "=3" --> L6["+ve: 1\n -ve: 0"];
    N5 -- "=5" --> L5["+ve: 1\n -ve: 0"];