Xpath get nth element - xpath

Question

I'm trying to pull the death age from this html using xpath. The issue im having is that it doesn't have a class name or selector to grab the info. Is there a way to grab the 3rd class stat and then inside of that grab the 3rd a href and inside of that grab the age which is after the span?
This is what I have so far but it's not working
=IMPORTXML(B3,"//div[#class='stat'][3]")
The html code:
<div class="is-flex">
<div class="col-xs-6 col-md-12">
<div class="stat box">
<i class="icn icn-birthday"></i>
<h6> Birthday </h6>
<span class="hidden-sm">February</span><span class="hidden-xs hidden-md hidden-lg">Feb</span> 26, 1932
</div>
</div>
<div class="col-xs-6 col-md-12">
<div class="stat box">
<i class="icn icn-birthplace"></i>
<h6>Birthplace</h6>
Kingsland,
AR
</div>
</div>
<div class="col-xs-6 col-md-12">
<div class="stat box">
<i class="icn icn-age"></i>
<h6>Death Date</h6>Sep 12, 2003 (<span class="hidden-sm">age </span>71)
</div>
</div>
<div class="col-xs-6 col-md-12">
<div class="stat box">
<i class="icn icn-horiscope"></i>
<h6>Birth Sign</h6>Pisces
</div>
</div>
</div>

Answer 1

This xpath expression:
//div[#class='stat box'][1]/a[3]/text()
should output:
71

Answer 2

You can select the age value with the following XPath-1.0 expression:
=IMPORTXML(B3,"//div[contains(#class,'stat') and contains(h6,'Death Date')]/a[contains(#href,'/deceased/age')]/span/following::text()")
which returns 71 including some spaces.
To get rid of the leading and trailing spaces, use
=IMPORTXML(B3,"normalize-space(//div[contains(#class,'stat') and contains(h6,'Death Date')]/a[contains(#href,'/deceased/age')]/span/following::text())")