Mean average precision reduces to mean reciprocal rank (MRR) when there's only a single answer as in the case of narrative cloze, and would have scored the ranked lists as: Note that mean reciprocal rank has the same issues with guess list length that average rank does.
for the fairy Tale corpus, 1-skip bigrams and 2skip bigrams perform similarly, and both have lower average rank and higher Recall@50 than regular bigrams.