That seems like a pretty regular structure. If you know
that all the documents look like that, you can extract the values with a handful of simple regular expressions.
However, if the HTML documents can contain just about anything, including comments and attribute values that have content that looks like HTML, you'd need a full parser. You first have to parse your HTML, then parse the resulting structure, looking for a table that contains your data. This may be hard - the document could contain hundreds of tables, and you'll have to find the right one.
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