Question: who is the leader of the decepticons in transformers 4
[{'answer': 'Galvatron', 'provenance': [{'wikipedia_id': '232402', 'title': 'Decepticon', 'start_paragraph_id': 4, 'start_character': 737, 'end_paragraph_id': 4, 'end_character': 746, 'bleu_score': 1.0, 'section': 'Section::::Transformers: Generation 1.\n'}]}, {'provenance': [{'wikipedia_id': '232402', 'title': 'Decepticon', 'start_paragraph_id': 51, 'start_character': 0, 'end_paragraph_id': 51, 'end_character': 793, 'bleu_score': 0.9648601406493851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15222039444731239187}, 'section': 'Section::::Live-action films.:"Transformers: Age of Extinction" (2014 film).\n'}]}]