This is partially due to the fact that this module does not take into account the global, article-wide context, but instead relies on a combination of string distance and the PageRank algorithm.
the error can be explained by the linking formula in Section 3.1.: e.g., the string distance score over the title, the redirect and the disambiguation pages between the entity mention GM and the entity candidate db:Germany (0.32879817) is higher than with the entity candidate db:General_Motors (0.21995464).