Retrieving the position of an ancestor in nested <xsl:for-each>

Hi,

how can I retrieve the position of an ancestor in a nested 
<xsl:for-each>-loop?
My xml:

<?xml version="1.0" encoding="UTF-8"?>
<superNode>
        <Node>
                <SubNode>bla</SubNode>
                <SubNode>bla</SubNode>
                <SubNode>bla</SubNode>
        </Node>
        <Node>
                <SubNode>bla</SubNode>
        </Node>
        <Node>
                <SubNode>bla</SubNode>
                <SubNode>bla</SubNode>
        </Node>
        <Node>
                <SubNode>bla</SubNode>
        </Node>
</superNode>


The nested <xsl:for-each>:

<xsl:for-each select="Node">
        ...
        <xsl:for-each select="SubNode">
		Position of Node: <xsl:value-of select="??????????"/> <!-- How will I get 
the position of the anchestor -->
                Position of SubNode: <xsl:value-of select="position()"/>
        </xsl:for-each>
</xsl:for-each>


Thanks
Jonny

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