$VAR1 = bless( [
                 bless( {
                          'PRESTATE' => {
                                          'FORMAT' => 'plain',
                                          'NAME' => 'ejemplo numerica',
                                          'PREFIX' => '2 m + 2 m \\='
                                        },
                          'POSTSTATE' => '',
                          'ANSWERS' => [
                                         {
                                           'COMMENT' => 'cuatro',
                                           'TYPE' => 'NUMERICRANGE',
                                           'ANSWER' => [
                                                         '3',
                                                         '5'
                                                       ]
                                         }
                                       ]
                        }, 'Gift::NUMERIC' ),
                 bless( {
                          'PRESTATE' => {
                                          'FORMAT' => 'plain',
                                          'NAME' => 'numerica con multiplicadores',
                                          'PREFIX' => '3 km + 3 km \\='
                                        },
                          'POSTSTATE' => '',
                          'ANSWERS' => [
                                         {
                                           'COMMENT' => 'seis km',
                                           'TYPE' => 'NUMERICRANGE',
                                           'ANSWER' => [
                                                         '5',
                                                         '7'
                                                       ]
                                         }
                                       ]
                        }, 'Gift::NUMERIC' )
               ], 'Gift' );