For example, say I am maintaining an inventory of the different produce my friends have and want the following table:
| People | Fruit | Vegetables |
| | Apple | Orange | Berry | Carrot | Lettuce |
| Adam | x | | x | x | |
| Bob | x | x | | | x |
| Carol | | x | | x | x |
x's denote that the person in that row has that fruit or vegetable. Is it possible to create a table with sub-headers like this?