Question: who came up with popcorn at the movies
[{'answer': 'Glen W. Dickson', 'provenance': [{'wikipedia_id': '232176', 'title': 'Popcorn', 'start_paragraph_id': 9, 'start_character': 671, 'end_paragraph_id': 9, 'end_character': 686, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '232176', 'title': 'Popcorn', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 808, 'bleu_score': 0.957408925615394, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12433084783526024794}, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '232176', 'title': 'Popcorn', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12433084783526024794}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '232176', 'title': 'Popcorn', 'section': 'Section::::History.\n', 'start_paragraph_id': 9, 'end_paragraph_id': 9, 'meta': {'evidence_span': ['Their minds eventually changed, however, and in 1938 a Midwestern theater owner named Glen W. Dickson installed popcorn machines in the lobbies of his theaters. The venture was a financial success, and the trend soon spread.', 'Their minds eventually changed, however, and in 1938 a Midwestern theater owner named Glen W. Dickson installed popcorn machines in the lobbies of his theaters.', 'During the Great Depression, popcorn was fairly inexpensive at 510 cents a bag and became popular. Thus, while other businesses failed, the popcorn business thrived and became a source of income for many struggling farmers, including the Redenbacher family, namesake of the famous popcorn brand. During World War II, sugar rations diminished candy production, and Americans compensated by eating three times as much popcorn as they had before. The snack was popular at theaters, much to the initial displeasure of many of the theater owners, who thought it distracted from the films. Their minds eventually changed, however, and in 1938 a Midwestern theater owner named Glen W. Dickson installed popcorn machines in the lobbies of his theaters. The venture was a financial success, and the trend soon spread.']}}]}]