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External Data Source

Source

Regular Expression
^(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\,*\s\s*\d{4}$|^(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)\,*\s\d{4}$|^(January|February|March|April|May|June|July|August|September|October|November|December)\,*\s\d{4}$|^(january|february|march|april|may|june|july|august|september|october|november|december)\,*\s\d{4}$