<human>: Question: What organization has Brazil tried to use to curb US cotton subsidies?
Answer: While Brazil was fighting the US through the WTO's Dispute Settlement Mechanism against a heavily subsidized cotton industry, a group of four least-developed African countries – Benin, Burkina Faso, Chad, and Mali – also known as "Cotton-4" have been the leading protagonist for the reduction of US cotton subsidies through negotiations.
 Is the question answered in a satisfactory fashion?

OPTIONS:
- yes
- no
<bot>: yes