Question: why did rome need to acquire new land through military expansion
[{'answer': 'plunder economy', 'provenance': [{'wikipedia_id': '4921176', 'title': 'Military of ancient Rome', 'start_paragraph_id': 22, 'start_character': 353, 'end_paragraph_id': 22, 'end_character': 368, 'bleu_score': 1.0, 'section': 'Section::::Funding and expenditures.:Plunder economy.\n'}]}, {'provenance': [{'wikipedia_id': '4921176', 'title': 'Military of ancient Rome', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 957, 'bleu_score': 0.9876155018005031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17282924791524598488}, 'section': 'Section::::Funding and expenditures.:Plunder economy.\n'}]}]