Question

Two hundred people died in accident, many of them children. 这是独立主格结构中的一句例句

Two hundred people died in accident, many of them children.
这是我看独立主格结构语法时候出现的一句例句
后面 many of them children,是代词加名词
但是我感觉这句话怎么这么奇怪，如果我说，我肯定要在后面加个are
two hundred people died in accident, many of them are child.
这样是不是语法错误了？还是说我加了are 肯定就不是独立主格结构了
那哪种表述比较正确呢？
请详细介绍一下本句语法，谢谢谢谢

Answer 1

Two hundred people died in accident, many of them （ being ） children.

这句话是完全正确的，是独立主格结构，省略了 being 。用 are 就变成谓语动词了， 逗号不能连接两个句子，要么也可用定语从句表达：
Two hundred people died in accident, many of whom were children.