Experimented with A Game of Thrones (version 1.46). It works...but fails to find mentions of a good half of characters. Just one example: Khal Drogo. Search finds 124 entries, X-Ray builder finds none. Sure, search identifies cases when "khal" and "Drogo" are separated by a few words (but are within the same location), finds "Drogo's" but still the difference between 100+ and None is striking.
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