Four of the seven bodies are male and three female,one of them a flight attendant.是啥结构啊?

题目

Four of the seven bodies are male and three female,one of them a flight attendant.是啥结构啊?
是不是省略了部分结构?比如：
{
Four of the seven bodies are male
and
three （of the seven bodies are）female
,
one of them （is）a flight attendant.
}
如果是,请告诉我这叫什么省略语法,告诉我链接也行,我自己看,以前没有见过这么省略的.
如果不是,请帮我分析句子结构.

答案