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.

In this paper we have formalized the problem of automatic fill-on-the-blanks quiz generation using two well-defined learning schemes: sequence classification and sequence labeling. 
 Question: Which two schemes are used?
sequence classification sequence labeling

The dataset consists of more than $0.3$ million records and has been made available for future research. 
 Question: What is the size of the dataset?
$0.3$ million records

We employ a multi-class Naive Bayes classifier as the second stage classification mechanism, for categorizing tweets appropriately, depending on the type of emergencies they indicate. 
 Question: What classifier is used for emergency categorization?

multi-class Naive Bayes