The challenge is that, due to the highly technical subject matter, it's not clear what the relationship between the two sentences should be. Your "subsequently" is given without the previous context, so there isn't enough information to understand the material.
But I can guess. If you are trying to restate the previous sentence (VIPS is the basis for detecting data, i.e. VIPS is a "region extractor") then there are various possibilities.
Therefore. Used if you are summing up a logical sequence.
In other words. Used if you are simply rephrasing the previous sentence.
In this regard / respect / sense. Used if you are presenting another aspect of the previous sentence that adds more information that may not be obvious.
Consequently. Used if the sentence is a natural consequence of the previous logical sequence. Note this "clashes" with "subsequently" -- it's a little odd to use both in the same paragraph or logical sequence, unless as a deliberate way to organize a complicated thought.
Of course, without any understanding of what VIPS is and how it works, "however", "nevertheless", "despite this", and various other transitions work just as well. There's really no way to know.