All indications in the first sentence are that this is a karate student from his gee and yellow belt, the second confirms the fact it is a karate student because of his Belt and is practicing in a Gym.


Consider the staetement "A young boy, dressed in a karate gee and wearing a yellow belt, stands ready to defend himself inside a gym.". Based on this statement, is "A young, yellow Belt, Karate Student is practicing in a Gym." a true statement? Yes/no/unknown