Sample Java code:

public static void main(String[] args) throws Exception {	
	//Input as raw text
	String textBody = TokenUtils.readFileContent("sample.txt");	
	
	Annotation document = DocumentProcessorFactory.getInstance().constructDocument(textBody);
	
	DocumentProcessor documentProcessor = new DocumentProcessor("test_id", document);
	DocumentProfile documentProfile = documentProcessor.processDocument();	
	
	//Output as JSON
	LOG.info(new ObjectMapper().writeValueAsString(documentProfile));
}

Sample JSON output:

{
	"documentId": "test_id",
	"sentences": [{			
		"sentence": "Arnold Schwarzenegger and Jerome L'Burgouis leads Mara's platoon of Vikings into New York City carnage against an unseen alien beast along with John Woo's superslick action extravaganza.",
		"offsetStart": 0,
		"offsetEnd": 186,
		"keywords": [{
			"word": "carnage",
			"lemma": "carnage",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 95,
			"offsetEnd": 102
		},
		{
			"word": "beast",
			"lemma": "beast",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 127,
			"offsetEnd": 132
		},
		{
			"word": "extravaganza",
			"lemma": "extravaganza",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 173,
			"offsetEnd": 185
		},
		{
			"word": "superslick",
			"lemma": "superslick",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 155,
			"offsetEnd": 165
		},
		{
			"word": "leads",
			"lemma": "lead",
			"keywordType": "O",
			"pos": "VBZ",
			"offsetStart": 44,
			"offsetEnd": 49
		},
		{
			"word": "platoon",
			"lemma": "platoon",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 57,
			"offsetEnd": 64
		},
		{
			"word": "action",
			"lemma": "action",
			"keywordType": "O",
			"pos": "NN",
			"offsetStart": 166,
			"offsetEnd": 172
		},
		{
			"word": "unseen",
			"lemma": "unseen",
			"keywordType": "O",
			"pos": "JJ",
			"offsetStart": 114,
			"offsetEnd": 120
		},
		{
			"word": "alien",
			"lemma": "alien",
			"keywordType": "O",
			"pos": "JJ",
			"offsetStart": 121,
			"offsetEnd": 126
		}],
		"entities": [{
			"entity": "Jerome L'Burgouis",
			"entityType": "PERSON"
		},
		{
			"entity": "Arnold Schwarzenegger",
			"entityType": "PERSON"
		},
		{
			"entity": "John Woo",
			"entityType": "PERSON"
		},
		{
			"entity": "Vikings",
			"entityType": "PERSON"
		},
		{
			"entity": "Mara",
			"entityType": "PERSON"
		},
		{
			"entity": "New York City",
			"entityType": "LOCATION"
		}]
	}]	
}