using part properties in labels

Total noob, sorry. I've brought in an assembly from solid works and I'm trying to label a specific part with a property from the custom tab of the file properties from solidworks. I can label it with actor.name and I get the file name but I'd like to use the properties from the part (part number, part name, weight...all the stuff that our mech designers have already entered.

Am I importing/exporting the assembly wrong?

SolidworksComposer