Question: what is serena's mom's name in gossip girl
[{'answer': 'Lily van der Woodsen', 'provenance': [{'wikipedia_id': '13345121', 'title': 'List of Gossip Girl characters', 'start_paragraph_id': 2, 'start_character': 857, 'end_paragraph_id': 2, 'end_character': 877, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13345121', 'title': 'List of Gossip Girl characters', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1385, 'bleu_score': 0.8335625133905421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6345440710003378117}, 'section': 'Section::::Abstract.'}]}]