+------+-----+------+-----+------+
| e                 | f   |      |
+------+-----+------+-----+------+
| c          | d                 |
+------+-----+------+-----+------+
|      | a          | b          |
+------+-----+------+-----+------+
| mpg  | cyl | disp | hp  | drat |
+======+=====+======+=====+======+
| 21.0 | 6   | 160  | 110 | 3.90 |
+------+-----+------+-----+------+
| 21.0 | 6   | 160  | 110 | 3.90 |
+------+-----+------+-----+------+
| 22.8 | 4   | 108  |  93 | 3.85 |
+------+-----+------+-----+------+ 
