Complex sentence: He was caught in an armbar at the end of round one and actually tapped out after the bell signaling the end of the round had already rung, however, and he continued in round two with his arm noticeably injured.
Split into simpler sentences: He was caught in an armbar at the end of round one and actually tapped out. The bell signaling the end of the round had already rung, however, and he continued in round two with his arm noticeably injured.