请问这句话中that引导的句子是以concerns 为先行词的同位语从句吗Concerns were raised that witnesses might be encouraged to exaggerate their stories in court to ensure guilty verdicts.

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请问这句话中that引导的句子是以concerns 为先行词的同位语从句吗
Concerns were raised that witnesses might be encouraged to exaggerate their stories in court to ensure guilty verdicts.