Convert String Value To MdmValue

Dear Experts,

I'm new to MDM, i want to convert String to MdmValue., as i'm getting region and then getLookupDisplayValue, which is returning string but i want MdmValue for futher process.

FieldId fID = reslt[k].getMetadata().getFieldId("MDM_REGION");

String abc = reslt[k].getLookupDisplayValue(fID);

Any hlep will greatly appricated.

Thanks

AB