Question: how many members are nominated by the president in rajya sabha
[{'answer': '12', 'provenance': [{'wikipedia_id': '232210', 'title': 'Rajya Sabha', 'start_paragraph_id': 1, 'start_character': 305, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]