Not able to get Data Context For Parent Item in WPF

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C#

WPF

DataContext

Hi, I am trying to add a Context Menu and bind a command to that in my tree as shown in code below. I get it, Since I am adding the Context Menu in ListBox then I will get the DataContext of List box.
So here my question is How can I get the DataContext of ItemsControl while creating the Context Menu at ListBox.

Please let me know your suggestions.
Thanks.

<ItemsControl ItemsSource="{Binding Path=CollegeViewModel}">
  <ItemsControl.ItemTemplate>

     <HierarchicalDataTemplate>
       <StackPanel>
         <Label Content="{Binding Path=DisplayText}"/>
           <TreeView ItemsSource="{Binding Path=Children}">
              <TreeView.Resources>

               <HierarchicalDataTemplate DataType="{x:Type common:StudentItem}" ItemsSource="{Binding Path=Children}">
               <TextBlock Text="{Binding Path=DisplayText}"/>
               </HierarchicalDataTemplate>

               <HierarchicalDataTemplate DataType="{x:Type common:TeacherItem}" ItemsSource="{Binding Path=Children}">
               <TextBlock Text="{Binding Path=DisplayText}"/>
               </HierarchicalDataTemplate>


              <HierarchicalDataTemplate DataType="{x:Type common:LecturerItem}" ItemsSource="{Binding Path=Children}">
              <TextBlock Text="{Binding Path=DisplayText}" />
              </HierarchicalDataTemplate>

                 <DataTemplate DataType="{x:Type common:Leaf}">

                  <ListBox ItemsSource="{Binding Children}" >                                          
                    <ListBox.ContextMenu>
                      <ContextMenu>
                       <MenuItem Header="QuickView" Command="{Binding ExitCommand}"/>
                      </ContextMenu>
                     </ListBox.ContextMenu>                                         
                   </ListBox>

                 </DataTemplate>
                                 
                                   
               </TreeView.Resources>

              </TreeView>
            </StackPanel>
         </HierarchicalDataTemplate>

       </ItemsControl.ItemTemplate>
    </ItemsControl>