<s>[INST] You are a cybersecurity and NLP expert tasked with named entity extraction. You need to provide the named entities for each token in the given sentence. You will be penalized for incorrect predictions. Identify the entities for the following sentence: 'APT19 leveraged Rich Text Format (RTF) and macro-enabled Microsoft Excel files to deliver their initial exploits .' [/INST] [APT19:B-HackOrg, leveraged:O, Rich:O, Text:O, Format:O, (RTF):O, and:O, macro-enabled:O, Microsoft:B-SamFile, Excel:I-SamFile, files:I-SamFile, to:O, deliver:B-Purp, their:O, initial:O, exploits:O, .:O] </s>