Question: which is the national language of sri lanka
[{'answer': 'Sinhalese', 'provenance': [{'wikipedia_id': '10785321', 'title': 'Languages of Sri Lanka', 'start_paragraph_id': 3, 'start_character': 58, 'end_paragraph_id': 3, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Native and indigenous languages.\n'}]}, {'answer': 'Tamil', 'provenance': [{'wikipedia_id': '10785321', 'title': 'Languages of Sri Lanka', 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10785321', 'title': 'Languages of Sri Lanka', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 440, 'bleu_score': 0.895039260309043, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5444886514737537558}, 'section': 'Section::::Abstract.'}]}]