Question: what is the median wage in the uk
[{'answer': 'approximately £ 21,000 a year', 'provenance': [{'wikipedia_id': '14946657', 'title': 'Income in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 172, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '14946657', 'title': 'Income in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 588, 'bleu_score': 0.85606064569643, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 734067301488967153}, 'section': 'Section::::Abstract.'}]}]