|context> => |context: hello friends>

friends-list |*> #=> extract-value list-to-words extract-value friends |_self>
hello! |*> #=> merge-labels(|Hello > + |_self> + |!>)
friends |person: Eric> => |person: Fred> + |person: Sam> + |person: Harry> + |person: Mary> + |person: liz>
friends |Fred> => |Jack> + |Harry> + |Ed> + |Mary> + |Rob> + |Patrick> + |Emma> + |Charlie>
friends |Sam> => |Charlie> + |George> + |Emma> + |Jack> + |Rober> + |Frank> + |Julie>
friends |Charlie> => |Jack> + |Emma>