These slot-fillers should always be elaborated to an extra level of
detail when SHAKEN gives a description:

slot: purpose
filler: *

slot: object-of
filler: Be-Accessible, Be-Inacessible, Be-Touching (and their subclasses)

slot: *
filler: Aggregate or any of its subclasses

slot: location
filler: Portal or Region or any of their subclasses
(note: in all other cases HIDE location)