How to use Stardog's split() function in an SMS

Stardog's split() function returns an array literal. With SPARQL, I can use Stardog's unnest() to extract the strings from the array.

Similar to the example here: Query Stardog | Stardog Documentation Latest

However, SMS mappings don't allow the use of unnest, and only allow bind statements.

Is there a way to use split() with SMS mappings, or any alternative way to split strings of variable lengths in an SMS?