xslt :如何在xslt中不拆分/剪切单词的情况下子字符串地址字段

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes"/>

  <xsl:template match="/">
    <xsl:variable name="address" select="'123 Main Street, New York'"/>
    <xsl:variable name="substring" select="substring($address, 5, 9)"/>
    
    <result>
      <substring>
        <xsl:value-of select="$substring"/>
      </substring>
    </result>
  </xsl:template>
</xsl:stylesheet>

<result>
  <substring>Main Stre</substring>
</result>