Question: what type of key does a hashing algorithm use
[{'answer': 'search', 'provenance': [{'wikipedia_id': '13790', 'title': 'Hash function', 'start_paragraph_id': 5, 'start_character': 114, 'end_paragraph_id': 5, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Uses.:Hash tables.\n'}]}, {'provenance': [{'wikipedia_id': '13790', 'title': 'Hash function', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 381, 'bleu_score': 0.9227084493702921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11086582956186377702}, 'section': 'Section::::Uses.:Hash tables.\n'}]}]