question: A rider to the Indian Appropriations Act of 1871 provided that the US government could not do what with an Indian nation ?
answer: contract by treaty
turker_answer: A rider to the Indian Appropriations Act of 1871 provided that the US government could not do contract by treaty with an Indian nation .
rule-based: A rider to the Indian Appropriations Act of 1871 provided that the US government could not do contract by treaty with an Indian nation .