Question: who discovered that energy travels in discrete units that he called quanta
[{'answer': 'Max Planck', 'provenance': [{'wikipedia_id': '20646064', 'title': 'Quantum', 'start_paragraph_id': 5, 'start_character': 9, 'end_paragraph_id': 5, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Etymology and discovery.\n'}]}, {'provenance': [{'wikipedia_id': '20646064', 'title': 'Quantum', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 980, 'bleu_score': 0.881018142356997, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18292861126994017794}, 'section': 'Section::::Etymology and discovery.\n'}]}]