Predictive intelligence for string output fields

[Vedavalli]

Hi 
Using classification solution i want to predict for short description(this will be output field) but for selecting output field as short description is not showing and i can't see string fields in output field.

how to get string fields in output field?
in one kb article by SN they mentioned we can predict for string fields please find the below article:
https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0781894

[Tanushree Maiti]

Hi @Vedavalli 

Refer  Predictive Intelligence FAQ: Predictive Intelligence FAQ

:Q:For classification solutions, which types of fields can be used as outputs? 
Similar to inputs, you can select any field available on the table. However, ServiceNow recommends using a string or a choice field with a finite set of possible values."