To get particular value from HTML text

I have a scenario where i need to fetch the value of patientIId from the text returned in the format of HTML. When i query the below xpath driver.findElement(By.Xpath("//div[@name='DemographicsTab']//div[@class='control-xml'][contains(text(),'< view view="SAC.UIConfig.GenericFrameTabberInnerCo')]

I get the below text

"<view view="SAC.UIConfig.GenericFrameTabberInnerContainer" 
    target-uri="DemographicsTab" 
    tab-appearance=" AbsoluteView TabContainer "
    appearance-class=" AbsoluteView TabContainer " title="">
    <argument local-name="PagePatientIID" value="10032" />
    <argument local-name="Patient" value="10032" />
    <argument local-name="PagePatientDemographicsIID" value="53" />
    <argument local-name="Node" value="DemographicsTab" />
    <argument local-name="CurrentFrame" value="ContentFrame" /><argument local-name="CurrentViewTargetName" value="DemographicsTab" />
    </view>"

*

Kindly help me in getting the value of "PagePatientDemographicsIID" from the above text. i.e i need the value = "53"

Thanks In Advance