Single vs double quotes

In the following JSON:

```
[
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "Organization name"
},
{
"@context": "https://schema.org",
"@type": "WebSite",
"name": "Website name"
}
]
```

I'm trying to get the `name` value for the first object (i.e., `"Organization name"`). I'm using https://jmespath.org/ but I'm posting here as I assume it uses `jmespath.js`.

I understand this expression won't work because `@` has a special meaning: `[?@type=='Organization'].author.name` (it fails).

But this expression does not work either: `[?'@type'=='Organization'].author.name` (it returns `[]`).

This expression does work: `[?"@type"=='Organization'].author.name`...

...but this one doesn't: `[?"@type"=="Organization"].author.name` (it returns `[]`).

There seems to be some inconsistency regarding where double quotes and where single quotes should be used.