Optional : When set to true (default), the response is an object of responses with providers names as keys :
{"google" : { "status": "success", ... }, }
When set to false the response structure is a list of response objects :
[{"status": "success", "provider": "google" ... }, ].

Optional : When set to false (default) the structure of the extracted items is list of objects having different attributes :
{'items': [{"attribute_1": "x1","attribute_2": "y2"}, ... ]}
When it is set to true, the response contains an object with each attribute as a list :
{ "attribute_1": ["x1","x2", ...], "attribute_2": [y1, y2, ...]}

Optional : Shows the original response of the provider.
When set to true, a new attribute original_response will appear in the response object.