Given the sentence "A man in a blue uniform on rollerskates and a man in camouflage on skates compete in a ring." is it true that "Two men on skates compete in a ring."?
Step-by-step reasoning:
yes
A man in a blue uniform on rollerskates and a man in camouflage on skates are obviously the two men on skates in a ring.

You would need skates to be in a roller ring.

.

The answer: yes