Public endpoints often have a limited return (say 10000 triples) to overcome this and do larger queries one can work with OFFSET if necessary. This can be implemented in knime using the Java Snippet node and Flow Variables. (Use responsibly)
EXAMPLES Server: 08_Other_Analytics_Types/06_Semantic_Web/09_Doing_a_large_Query_on_a_public_endpoint08_Other_Analytics_Types/06_Semantic_Web/09_Doing_a_large_Query_on_a_public_endpoint*
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* Find more about the Examples Server here.
The link will open the workflow directly in KNIME Analytics Platform (requirements: Windows; KNIME Analytics Platform must be installed with the Installer version 3.2.0 or higher). In other cases, please use the link to a zip-archive or open the provided path manually