摘要：引导定语从句的关系词有关系代词和关系副词.常见的关系代词包括that.which.who等.关系副词包括where.when.why等.关系代词和关系副词放在先行词及定语从句之间起连接作用.同时又作定语从句的重要成分.
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以下句子为含有定语从句的复合句，请将引导定语从句的关系代词找出来，划线标出。
“Who am I”is one of the films that Jacky Chen stars in．
以下句子为含有定语从句的复合句，请将引导定语从句的关系代词找出来，划线标出。
Mr．Lee said that he had already got the information which he needed．
以下句子为含有定语从句的复合句，请将引导定语从句的关系代词找出来，划线标出。
Elvis Presley was a famous singer who was considered the king of rock and roll in the western music world．