Xpath for data in div tags

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C#3.5

XPath

webscraping

<div id="caption">
<div>
    Position: Passenger Side Front
    <br></br>
    Color: Black
    <br></br>
    Finish: Smooth / Paintable
    <br></br>
    Part Brand: LatchWell
    <br></br>
    Lifetime Warranty
</div>

<pre lang="xml">I need xpath  that should  fetch **Part Brand :** values.My desired OP is<br/>
**LatchWell**

Here is my code :

tag = htmlDoc.DocumentNode.SelectSingleNode("//div[@id='caption']//div");
                if (tag != null)
                {
                    wi.Brand = tag.InnerText.Trim();
                }

I am not able to split by using split functions because the data above and below Part Brand are dynamic.