Although Campbell reached a speed of over 304 miles per hour,句子成分

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Although Campbell reached a speed of over 304 miles per hour,句子成分

of 后面的部分是多speed 的补充说明,是一个定语从句,中间省略了which is请详细点儿说谁是主谓宾或主系表定状补主语是Campbell,谓语是reached, 宾语是a speed,后面就是定语The great racing drive句子成分,谢谢额。。。。这个句子是不是不完整啊?