Question: what are the four main sources of fresh water on earth
[{'answer': 'fresh groundwater and soil moisture', 'provenance': [{'wikipedia_id': '230001', 'title': 'Fresh water', 'start_paragraph_id': 16, 'start_character': 193, 'end_paragraph_id': 16, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Water distribution.\n'}]}, {'answer': 'fresh water derived from precipitation', 'provenance': [{'wikipedia_id': '230001', 'title': 'Fresh water', 'start_paragraph_id': 16, 'start_character': 689, 'end_paragraph_id': 16, 'end_character': 727, 'bleu_score': 1.0, 'section': 'Section::::Water distribution.\n'}]}, {'answer': 'surface water in lakes , swamps and rivers'}, {'answer': 'frozen in glaciers , ice and snow'}, {'provenance': [{'wikipedia_id': '230001', 'title': 'Fresh water', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 944, 'bleu_score': 0.8997151294158441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10613212517254097517}, 'section': 'Section::::Water distribution.\n'}]}]