求救，which引导的定语从句，英语语法成分分析

Question

例句
“Our sentence selector leverages three simple techniques , which we show to be highly effective on the task of sentence selection.”

请问各位大神，which引导的定语从句里面，to be highly这个是做什么成分，是show的宾补嘛，补全应该是 show which to be ·····吗，请赐教！

Answer 1

which可以引导定语从句、名词从句（包括主语、宾语、表语、同位语从句） This is the temple which I visited yesterday. The question is which we should choose, this white car or that red car。 Which place we will go to is not clear. He didn't tell me which I should buy.追问

您好，to be highly这个是做什么成分 ？

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