I'm new to coding so I apologize for any novice mistakes.

I'm looking to scrape data from a webpage using python and selenium. I think that I've identified the xpath for the data I'm looking to extract, but when I extract it, it returns "None" instead of returning the data.

I am trying to pull "Oct 2001 - Jan 2002" from the following html:

```
<h4 class="pv-entity__date-range t-14 t-black--light t-normal">
      <span class="visually-hidden">Dates Employed</span>
      <span>Oct 2001 – Jan 2002</span>
    </h4>

```

To do so, I've run the following code:

```
sel = Selector(text=driver.page_source)
prev = sel.xpath('.//span[@class = "pv-entity__date-range.t-14.t-black--light.t-normal"][1]').extract_first()
print(prev)

```

Which outputs:

```
None

```

How can I identify "Oct 2001 - Jan 2002" from this bit of html?

Thank you in advance for your help!