With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Huntington's disease is caused by inheritance.
text_B: The Renewable Fuels Association -LRB- RFA -RRB- represents the ethanol industry promoting policies , regulations , and research and development initiatives that will lead to the increased production and use of ethanol fuel .. ethanol fuel. ethanol fuel. First organized in 1981 , RFA serves as a voice of advocacy for the ethanol industry , providing research data and industry analysis to its members , to the public via the media , to the United States Congress , as well as to related federal and state agencies .. United States Congress. United States Congress
not_related.