I have a text file

Are you sure it's a text file? It looks like XML (or maybe HTML?) to me. Even if just a section of a longer text file contains XML data, I would strongly recommend extracting that section of text and using a proper module to parse it (see e.g. Parsing HTML/XML with Regular Expressions for why). Mojo::DOM has a nice interface, and it handles even this case of the XML not having a root node:

use warnings;
use strict;
use Mojo::DOM;

my $html = <<'END_HTML';
<Answer type="string">ServerName</Answer>
<Answer type="string">10.10.10.11</Answer>
<Answer type="string">Windows Server 2012</Answer>
END_HTML

# note: ->xml(1) turns on case sensitivity
my $dom = Mojo::DOM->new->xml(1)->parse($html);
my $values = $dom->find('Answer')->map('all_text');

print "Computer: $values->[0]\n";
print "IP Address: $values->[1]\n";
print "OS: $values->[2]\n";
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