Question: which nitrogenous base is the complementary base for thymine
[{'answer': 'Adenine', 'provenance': [{'wikipedia_id': '1393654', 'title': 'Nitrogenous base', 'start_paragraph_id': 4, 'start_character': 813, 'end_paragraph_id': 4, 'end_character': 820, 'bleu_score': 1.0, 'section': 'Section::::Role in nucleic acids.\n'}]}, {'provenance': [{'wikipedia_id': '1393654', 'title': 'Nitrogenous base', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 972, 'bleu_score': 0.7915651031967781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15780838888416588933}, 'section': 'Section::::Role in nucleic acids.\n'}]}]