I have a spark dataframe that has 2 columns formed from the function collect\_set. I would like to combine these 2 columns of sets into 1 column of set. How should I do so? They are both set of strings 

For Instance I have 2 columns formed from calling collect\_set

```
Fruits                  |    Meat
[Apple,Orange,Pear]          [Beef, Chicken, Pork]

```

How do I turn it into:

```
Food

[Apple,Orange,Pear, Beef, Chicken, Pork]

```

Thank you very much for your help in advance