Question: who wrote the song last train to clarksville
[{'answer': 'Tommy Boyce', 'provenance': [{'wikipedia_id': '5463753', 'title': 'Last Train to Clarksville', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bobby Hart', 'provenance': [{'wikipedia_id': '5463753', 'title': 'Last Train to Clarksville', 'start_paragraph_id': 1, 'start_character': 233, 'end_paragraph_id': 1, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5463753', 'title': 'Last Train to Clarksville', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 618, 'bleu_score': 0.9133401472346221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5315642039045585260}, 'section': 'Section::::Abstract.'}]}]