The "Must contain" field does MATCH GENERAL CONCEPTS
such as "baseball", "world history", or "sports". It strictly matches
strings of letters in the entry. Try parts of words and very short phrases.
Even though there are over 10,000 entries in the database, do NOT be
too specific it will match nothing.
For more detail and numerous examples
see my
HELP.)
Returns the last 60 matches. AD/BC disabled if no year given.
For a list of Y2K dates see link at bottom of page.