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One of the dependencies that, when found in the summary but not in the article, indicates a possible error is the "pobj" (object of preposition) dependency. Furthermore, we only match *pobj* dependencies when the target word is "in", as in this example. In this case it's obvious that "in U.S." is not found in the article, as "U.S." is a hallucinated entity itself as discussed in the entity matching paragraph. So technically we don't need dependency comparison to spot the error from this summary. |