Two white men dressed in white and black Tae Kwon Do uniforms, competing with each other on a green and red matt while a team of onlookers watch.
A duo of martial artists are competing on a colorful mat for a group of spectators.
two men would be a duo. IF they are dressed in tae kwon do uniforms, it follows that they are martial artists. onlookers is another word for spectators.
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