Question: what gland is also known as the mixed gland
[{'answer': 'The sublingual glands', 'provenance': [{'wikipedia_id': '207336', 'title': 'Salivary gland', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Structure.:Sublingual glands.\n'}]}, {'provenance': [{'wikipedia_id': '207336', 'title': 'Salivary gland', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 538, 'bleu_score': 0.977397480575333, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10221102665728063859}, 'section': 'Section::::Structure.:Sublingual glands.\n'}]}]