Question: who built the first practical telescope and developed a theory of colour
[{'answer': 'Isaac Newton', 'provenance': [{'wikipedia_id': '213607', 'title': 'History of the telescope', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '213607', 'title': 'History of the telescope', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 2114, 'bleu_score': 0.984643331373207, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15109500864671268472}, 'section': 'Section::::Optical telescopes.:Further refinements.:Reflecting telescopes.\n'}]}]