"Zone Thermal Comfort Fanger Model PPD" is not in RDD file of EnergyPlus

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I try to create a sensor in EMS for "Zone Thermal Comfort Fanger Model PPD", for further processing. From the RDD file, there is no sensor available called: "Zone Thermal Comfort Fanger Model PPD". However, there is a such variable in Output:Variable modules.

EnergyManagementSystem:Sensor,
ppd_sensor,              !- Name
Core_ZN ZN,              !- Output:Variable or Output:Meter Index Key Name
Zone Thermal Comfort Fanger Model PPD;  !- Output:Variable or Output:Meter Name

Output:Variable,
Core_ZN ZN,       !- Key Value
Zone Thermal Comfort Fanger Model PPD,  !- Variable Name
timestep;                !- Reporting Frequency

The Error i got:

* Severe * Invalid Output:Variable or Output:Meter Name =ZONE THERMAL COMFORT FANGER MODEL PPD * ~~~ * Entered in EnergyManagementSystem:Sensor=PPD_SENSOR * ~~~ * Output:Variable Name not found * Fatal * Errors found in processing Energy Management System input. Preceding condition causes termination.

(EnergyPlus 9.0).

How do i add such a variable to RDD? Thanks.