Question: when did the women's professional baseball league start
[{'answer': '1943', 'provenance': [{'wikipedia_id': '594817', 'title': 'All-American Girls Professional Baseball League', 'start_paragraph_id': 1, 'start_character': 152, 'end_paragraph_id': 1, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '594817', 'title': 'All-American Girls Professional Baseball League', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 600, 'bleu_score': 0.5027464531858521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1575279838316268282}, 'section': 'Section::::Abstract.'}]}]