Notes: The default parameters are typically good choices, but more sophisticated models can be fitted by tweaking them in various ways. You might not want to include the records with empty Text Column into the input file if you don't want to count them into the burst result. This could be happens while you have a set of records from year 1970 - 2011. But there are no text information between 1970 - 1980. Since it is lack of information rather than no burst, you might want to remove records in year 1970 - 1980 to have a better focus period.
J. Kleinberg. Bursty and Hierarchical Structure in Streams. Proc. 8th ACM SIGKDD Intl. Conf. on Knowledge Discovery and Data Mining, 2002.