$VAR1 = {
          'sas_residue_annotation' => [
                                        {
                                          'xmlns' => 'http://www.ebi.ac.uk/WSsas/Schema',
                                          'sources' => [
                                                       {
                                                         'source' => [
                                                                     {
                                                                       'source_name' => [
                                                                                        '1iho'
                                                                                      ],
                                                                       'ref_evalue' => [
                                                                                       '5.5e-50'
                                                                                     ],
                                                                       'ref_overlap' => [
                                                                                        '282'
                                                                                      ],
                                                                       'ref_identity' => [
                                                                                         '47.20'
                                                                                       ],
                                                                       'ref_pmid' => [
                                                                                     '11377204'
                                                                                   ]
                                                                     },
                                                                     {
                                                                       'source_name' => [
                                                                                        '1mop'
                                                                                      ],
                                                                       'ref_evalue' => [
                                                                                       '8.3e-38'
                                                                                     ],
                                                                       'ref_overlap' => [
                                                                                        '264'
                                                                                      ],
                                                                       'ref_identity' => [
                                                                                         '43.60'
                                                                                       ],
                                                                       'ref_pmid' => [
                                                                                     '12717031'
                                                                                   ]
                                                                     },
                                                                     {
                                                                       'source_name' => [
                                                                                        '1n2b'
                                                                                      ],
                                                                       'ref_evalue' => [
                                                                                       '8.2e-38'
                                                                                     ],
                                                                       'ref_overlap' => [
                                                                                        '264'
                                                                                      ],
                                                                       'ref_identity' => [
                                                                                         '43.60'
                                                                                       ],
                                                                       'ref_pmid' => [
                                                                                     '12717031'
                                                                                   ]
                                                                     },
etc ...