query: In email recognizing pattern for entity in ibm watson what is the term {2, } indicates here?
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negative_passages.text: What does the ampersand indicate in this bash command 1>&2
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negative_passages.text: What does the "@" symbol do in SQL?
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negative_passages.text: The reference to entity "foo" must end with the ';' delimiter
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negative_passages.text: How to identify the pattern of a sequence
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negative_passages.text: What is the role of an unescaped circumflex or hat character " ^ "?
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negative_passages.text: What is this letter/symbol called?