In this task, you will be presented with a context from an academic paper and a question separated with a 
. You have to answer the question based on the context.
Q: Each annotator annotated 90 reference sentences (i.e. from the training corpus) with which style they thought the sentence was from. The accuracy on this baseline task for annotators A1, A2, and A3 was 80%, 88%, and 80% respectively, giving us an upper expected bound on the human evaluation. 
 Question: How they perform manual evaluation, what is criteria?
A: 
accuracy