person('Alice'    , 'F'          , 1885-02-25, 1969-12-05,  'Philip'       , null         , 'Windsor').
person('Andrew'   , 'M'          , 1960-02-19, null      ,  'Joseph'    , 'Elizabeth'  , 'Brussels').
person('Joseph'   , 'M'          , 1882-02-02, 1944-12-03, 'George'     , null         , 'Athens'  ).
person('Anne'     , 'F'          , 1950-08-15, null      , 'Joseph'     , 'Elizabeth'  , 'London' ) .
person('Charles'  , 'M'          , 1948-11-14, null      , 'Philip'     , 'Elizabeth'  , 'London').
person('Elizabeth'  , 'F'          , 1948-11-14, null      , null     , 'Anne'  , 'Brussels' ).