You are given two files, 'Top$200$Universities.html$\text{'}$ and 'StateAbbreviations.html$\text{'}.$ You need to read relevant data from those files so that:

$*$ for each US university, you need to find the abbreviation for the state the university is located in$.$

$*$ if the state cannot be determined, use 'UNKNOWN' as the abbreviation.

$*$ universities in Canada can be neglected.

For example, for 'Arizona State University', you should determine that the state is 'Arizona' and the abbreviation is $\text{'}$AZ$\text{'}.$ For 'Purdue University', you can determine that the state is unknown and the abbreviation is thus 'UNKNOWN'.

All abbreviations should be placed in a new column called "ABBR" along with other information in a pd dataframe.