Question: when were the first computers invented and used
[{'answer': '1944', 'provenance': [{'wikipedia_id': '7878457', 'title': 'Computer', 'start_paragraph_id': 33, 'start_character': 661, 'end_paragraph_id': 33, 'end_character': 665, 'bleu_score': 1.0, 'section': 'Section::::History.:Digital computers.:Vacuum tubes and digital electronic circuits.\n'}]}, {'provenance': [{'wikipedia_id': '7878457', 'title': 'Computer', 'start_paragraph_id': 33, 'start_character': 0, 'end_paragraph_id': 33, 'end_character': 710, 'bleu_score': 0.909046170013389, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15260940016211656274}, 'section': 'Section::::History.:Digital computers.:Vacuum tubes and digital electronic circuits.\n'}]}]