$VAR1 = {
          'G' => {
                   'group2' => 1,
                   'group3' => 1
                 },
          'B' => {
                   'group4' => {
                                 'host1' => 'ONLINE'
                               },
                   'group2' => {
                                 'host3' => 'OFFLINE',
                                 'host2' => 'ONLINE'
                               },
                   'group1' => {
                                 'host2' => 'OFFLINE',
                                 'host1' => 'ONLINE'
                               },
                   'group5' => {
                                 'host3' => 'ONLINE'
                               },
                   'group3' => {
                                 'host3' => 'ONLINE'
                               }
                 }
        };
Group 'group2' is frozen on host 'host2'.
Group 'group3' is frozen on host 'host3'.