Question: name of the lead singer in linkin park
[{'answer': 'Chester Charles Bennington', 'provenance': [{'wikipedia_id': '142809', 'title': 'Chester Bennington', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '142809', 'title': 'Chester Bennington', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 264, 'bleu_score': 0.565022913383834, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15669005909393518408}, 'section': 'Section::::Abstract.'}]}]