I'm trying to scrape a list in a site that leads to other pages that has the same formatting.

I was able to create a collection of all the a tags, but when I try to visit a collection of pages, the key I try to create with it doesn't get added in my returned object.

Here's an example of what I'm trying to do with stack overflow: 

```
var Xray = require('x-ray');
var x = Xray();
x('http://stackoverflow.com/', {
    title: x(['a@href'], 'title'),
}) (function(err, obj) {
    console.log(obj);
});

```

I'm expecting my obj.title to be a list of titles of all the a href pages, instead I just get an empty object.

However if I were to try just using the first a href then I get the title no problem.

```
var Xray = require('x-ray');
var x = Xray();
x('http://stackoverflow.com/', {
    title: x('a@href', 'title'),
}) (function(err, obj) {
    console.log(obj);
});

```

Has anyone run into this problem before?