Get Data under Highlight Json value pair

[EXTERNAL Taminidi Ravi (ETI, Automotive-Service-Solutions)]

I am trying to get the content under highlighting json string, but I am not 
able to map the values as the highlighting has "" and values. E.g below .

How can I get the value , is there any option at query syntax, current I used 
&h1.on and &h1.fl=<List of Fields>

"highlighting":{
    "":{
      "CatalogSearch_en-US":["<em>VCM</em>"],
      "Name_en-US":["<em>VCM</em> <em>TO</em> <em>LAPTOP</em> CABLE"],
      "Description_en-US":[".\n<em>VCM</em> (<em>Vehicle Communication 
Module</em>) / VMM (<em>Vehicle</em> Measurement <em>Module</em>) to Laptop 
Cable.\n\nPrevious part"]},
    "":{
      "CatalogSearch_en-US":["<em>VCM</em> <em>II</em>"],
      "Name_en-US":["<em>VCM</em> <em>II</em> <em>DLC</em> CABLE"],
      "Description_en-US":[".\n<em>VCM</em> <em>II</em> <em>DLC</em> cable"]},
    "":{
      "CatalogSearch_en-US":["<em>VCM</em>"],
      "Name_en-US":["8' DLC TO <em>VCM</em> <em>I</em> <em>CABLE</em>"],
      "Description_en-US":["8' DLC to <em>VCM</em> <em>I</em> 
<em>cable</em>."]},

Thanks

Ravi