Question: what abdominal muscle lies to either side of the linea alba
[{'answer': 'rectus abdominis', 'provenance': [{'wikipedia_id': '939131', 'title': 'Linea alba (abdomen)', 'start_paragraph_id': 2, 'start_character': 129, 'end_paragraph_id': 2, 'end_character': 145, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '939131', 'title': 'Linea alba (abdomen)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 288, 'bleu_score': 0.8571446863319131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16816190503216486709}, 'section': 'Section::::Abstract.'}]}]