Definition: In this task, you will be presented with a context from an academic paper and you have to write an answerable question based on the context. Your questions can be extractive, abstractive, or yes-no questions.
Input: For task 1, we use F1-score as evaluation metric. We use manual evaluation for task 2. There are five evaluation metrics for task 2 as following.

Task completion ratio: The number of completed tasks divided by the number of total tasks.

User satisfaction degree: There are five scores -2, -1, 0, 1, 2, which denote very dissatisfied, dissatisfied, neutral, satisfied and very satisfied, respectively.

Response fluency: There are three scores -1, 0, 1, which indicate nonfluency, neutral, fluency.

Number of dialogue turns: The number of utterances in a task-completed dialogue.

Guidance ability for out of scope input: There are two scores 0, 1, which represent able to guide or unable to guide.
Output:
What metrics are used in the evaluation?