Given the `band` table, with a `json` column holding an array :

```
id | people
---+-------------
1  | ['John', 'Thomas']
2  | ['John', 'James']
3  | ['James', 'George']

```

How to list the number of bands each name is part of?  

**Desired output:**

```
name   | count
-------+------------
John   | 2
James  | 2
Thomas | 1
George | 1

```