|context> => |context: Adelaide>
-- NB: in |word: x>, x must be lower-case (else active-buffer applied to read fails)
|city: Adelaide> => |word: adelaide>
|person: Queen Adelaide> => |word: adelaide>
|state: South Australia> => |word: adelaide>
|country: Australia> => |word: adelaide>

-- define some simple general rules
is-city-self |city: *> #=> |_self>
is-person-self |person: *> #=> |_self>
is-state-self |state: *> #=> |_self>
is-country-self |country: *> #=> |_self>