Question: when was the printing press invented in europe
[{'answer': 'around 1440'}, {'provenance': [{'wikipedia_id': '23295', 'title': 'Printing press', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 851, 'bleu_score': 0.6040494805088801, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15627152262430923010}, 'section': 'Section::::Abstract.'}]}]