|context> => |context: George>
source |context: George> => |sw-url: http://semantic-db.org/george.sw>

-- George is just some fictional character
|word: george> => |letter: g> . |letter: e> . |letter: o> . |letter: r> . |letter: g> . |letter: e>
spell |word: george> => |letter: g> . |letter: e> . |letter: o> . |letter: r> . |letter: g> . |letter: e>

|person: George> => |word: george>
age |person: George> => |age: 29>
dob |person: George> => |date: 1984-05-23>
hair-colour |person: George> => |hair-colour: brown>
eye-colour |person: George> => |eye-colour: blue>
gender |person: George> => |gender: male>
height |person: George> => |height: cm: 176>
wife |person: George> => |person: Beth>
occupation |person: George> => |occupation: car salesman>
friends |person: George> => |person: Fred> + |person: Jane> + |person: Liz> + |person: Andrew>
mother |person: George> => |person: Sarah>
father |person: George> => |person: David>
sisters |person: George> => |person: Emily>
brothers |person: George> => |person: Frank> + |person: Tim> + |person: Sam>

-- some general rules that apply to all people:
siblings |person: *> #=> brothers |_self> + sisters |_self>
children |person: *> #=> sons |_self> + daughters |_self>
parents |person: *> #=> mother |_self> + father |_self>
uncles |person: *> #=> brothers parents |_self>
aunts |person: *> #=> sisters parents |_self>
aunts-and-uncles |person: *> #=> siblings parents |_self>
cousins |person: *> #=> children siblings parents |_self>
grand-fathers |person: *> #=> father parents |_self>
grand-mothers |person: *> #=> mother parents |_self>
grand-parents |person: *> #=> parents parents |_self>
grand-children |person: *> #=> children children |_self>
great-grand-parents |person: *> #=> parents parents parents |_self>
great-grand-children |person: *> #=> children children children |_self>
immediate-family |person: *> #=> siblings |_self> + parents |_self> + children |_self>
friends-and-family |person: *> #=> friends |_self> + family |_self>


email |person: George> => |email: george.douglas@gmail.com>
education |person: George> => |education: high-school>
can-swim-self |person: George> => 0.7 |person: George>   -- an OK swimmer, but not a great one.
can-swim |person: George> => 0.7 |yes>  

-- George's father is dead:
is-dead-self |person: David Douglas> => |person: David Douglas>
is-dead |person: David Douglas> => |yes>
-- and so on.