What is the fine-grained topic of the following text: Suidobashi came back and said, &apos;Wait—I still want to fight Iron Glory.&apos;"
Goldberg then outlined the three ways to achieve victory: by a "robot knockout"—which amounts to knocking the opponent over—by disabling a robot, or by causing a pilot to surrender. Only return the topic.
Suidobashi's challenge to fight Iron Glory in a robot competition.