<!-- error: /unexpected .* expecting .optionally up to 1 of.*<interpunct>.* /Octothorpe/curly_brackets/tra .at text node: '13'/ -->
<Octothorpe xmlns:A="uri:type:A" xmlns:C="uri:type:C">
  <colon/>
  <curly_brackets>
    <la /><la /><blah /><anything><interpunct>43</interpunct></anything>
    <tra>13</tra>
  </curly_brackets>
</Octothorpe>