<setlist> <list> <s>apples</s> <s>oranges</s> <s>wiper blades</s> </list> <i>5</i> <s>bassoons</s> </setlist>
This expression results in the following list and returns null.
<list> <s>apples</s> <s>oranges</s> <s>wiper</> </null> </null> <s>bassoons</s> </list>