
+------+-----+------+
| mpg  | cyl | disp |
+======+=====+======+
| 21.0 | 6   | 160  |
+------+-----+------+
| 21.0 | 6   | -    |
+------+-----+------+
| 22.8 | 4   | 108  |
+------+-----+------+
| 21.4 | 6   | 258  |
+------+-----+------+ 
