httpagility pack scraping between broken tag - vb.net

Question

i need to scrape a p tag which has h3 tag after it but does not have a closing p tag. It looks like this :
<script ad>asdasdasd</script>
<p>Translation companies are
-----------------------
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<h3 class="this_class">mind blown site</h3>
There is no </p> tag so i cannot parse it completely. Now i have two questions :
1) can this be parsed using httpagility xpath ?
2) i have a function to find text between two strings (getbetween). But i have a doubt - If i use "asdasdasd" and " is it always 100% that vb.net will use the script tag which is just above h3 because there are 2-3 same lines - "asdasdasd"
3) Any other method you guys are aware of ?
(had to write in code so html does not mess up)
Regards,

Answer 1

It might be a good idea to post some more "real" html to really help you, at least the tags between the h3 and the p.
Anyway, this should get you the p-Tag from the h3-Tag.
HtmlDocument doc = new HtmlDocument();
doc.Load(... //Load the Html...
//Either of these lines will do
HtmlNode pNode = doc.DocumentNode.SelectSingleNode("//h3[#class='this_class']/preceding-sibling::p");
//HtmlNode pNode = doc.DocumentNode.SelectSingleNode("//h3[contains(text(),'mind blown site')]/preceding-sibling::p");
string pInnerHtml = pNode.NextSibling.InnerHtml; //Has the text "Translation companies are...."

Answer 2

So in general, to get all the nodes from the opening p tag to the start of a tag you don't want, you could do this:
var p = doc.DocumentNode.SelectSingleNode("//p");
var h3 = p.SelectSingleNode("following-sibling::h3[#class='this_class']");
var following = new List<string>();
for (var current = p.NextSibling; current != h3; current = current.NextSibling)
{
following.Add(current.InnerText);
}
var innerText = String.Concat(following);