【英语】Was it in the square,where there were lots of people,---

首先要分清句子结构,where there were lots of people 是the square的非限制性定语从句,而整个句子其实是一个强调句,转化为陈述句是
It was in the square that the accident took place.翻译为这个事故就是在这个广场发生的.