在给定的一篇文章中找到并替换指定的单词。
文章：
"In ancient Rome, gladiators were typically slaves, prisoners of war, or condemned criminals. They were trained in special schools and typically fought to the death in public events for the entertainment of the masses."

单词：
"entertainment"

替换成：
"amusement"
"In ancient Rome, gladiators were typically slaves, prisoners of war, or condemned criminals. They were trained in special schools and typically fought to the death in public events for the amusement of the masses."