Question: which chess piece holds the least value on a chess board
[{'answer': 'pawn', 'provenance': [{'wikipedia_id': '899908', 'title': 'Chess piece relative value', 'start_paragraph_id': 3, 'start_character': 53, 'end_paragraph_id': 3, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]