@TStark , try the below code

(function runMailScript(current, template, email, email_action, event) {
var demand = new GlideRecord("dmn_requirement");
demand.addQuery("demand", current.sys_id)
demand.query() //if its for one record
if(demand.next()){
template.print('Demand Requirement' + demand.short_description.getDisplayValue());
}
})(current, template, email, email_action, event);

Please Mark my answer Helpful & Accepted if I have answered your question.

Thanks,

Alka