帮忙分析一句子请帮忙分析一下句子的成分：well,one day a customer in the restauran

帮忙分析一句子
请帮忙分析一下句子的成分：well,one day a customer in the restaurant where George worked sent back his plate of fride potatoes because he said they were cut too thick.
where George worked sent back his plate of fride potatoes中worked后面为什么还会用个动词短语sent back?
感激不尽!