Question Answering for Privacy Policies:Combining Computational and Legal Perspectives
Table 2: Ten most frequent first words in questions in the PrivacyQA dataset. We observe high lexical diversity in prefixes with 35 unique first word types and 131 unique combinations of first and second words.
['Word', '(%)', 'Example Question From PrivacyQA']
We also observe low redundancy in the questions posed by crowdworkers over each policy, with each policy receiving ~49.94 unique questions despite crowdworkers independently posing questions. Questions are on average 8.4 words long. As declining to answer a question can be a legally sound response but is seldom practically useful, answers to questions where a minority of experts abstain to answer are filtered from the dataset. Privacy policies are ~3000 words long on average. The answers to the question asked by the users typically have ~100 words of evidence in the privacy policy document.