,
|    ( george ),( pete ),( fred ),( gene ),( ken   ))
|
|   ( 30's ,
|    ( al   ),( mike ),( doug ),( ralph ),( phil ),( ike  ),
|    ( nick ),( don  ),( ned  ),( rick  ),( ol   ),( neal ),( dave ))
|
|   ( 40's ,
|    ( art ),( clyde ),( karl ),( earl ))
|
|   (( junior_high ),( high_school ),( college ))
|
|   ( junior_high ,
|    ( art  ),( al    ),( clyde  ),( mike  ),( jim ),
|    ( john ),( lance ),( george ),( ralph ),( ike ))
|
|   ( high_school ,
|    ( greg ),( doug ),( pete ),( fred ),( nick )