Minor docs change

README.md

@@ -16,7 +16,9 @@ composer require cloudobjects/sdk
 
 ## Usage
 
-The primary purpose of the SDK is the retrieval of object descriptions from the CloudObjects Core Object API. To do so, you create an instance of the `CloudObjects\SDK\ObjectRetriever` class. You can use this class directy, but you can also use the static facade (`CloudObjects\SDK\ObjectRetrieverFacade`) or the global function `cloudobjects_get_object()`, depending on the architecture of your PHP application and your preferred coding style. You can use the high-level `CloudObjects\SDK\CloudObject` interface or the lower-level `ML\JsonLD\Node` interface to work with the parsed JSON-LD representation of the object.
+The primary purpose of the SDK is the retrieval of object descriptions from the CloudObjects Core Object API. To do so, you create an instance of the `CloudObjects\SDK\ObjectRetriever` class. You can use this class directy, but you can also use the static facade (`CloudObjects\SDK\ObjectRetrieverFacade`) or the global function `cloudobjects_get_object()`, depending on the architecture of your PHP application and your preferred coding style.
+
+You can use the high-level `CloudObjects\SDK\CloudObject` interface or the lower-level `ML\JsonLD\Node` interface (from the [sweetrdf/json-ld](https://packagist.org/packages/sweetrdf/json-ld) package) to work with the parsed JSON-LD representation of the object.
 
 ### Using the ObjectRetriever directly