英语翻译What are the two companies from which the Royal Dutch Sh

“荷兰皇家壳牌”这个公司是由哪两家公司组建而来的?
What are the two companies 这是哪两家公司?
from which the Royal Dutch Shell was established?定语从句,修饰companies的.
the Royal Dutch Shell was established from which（it,them--two companies)正常语序.
from which (it,them--two companies)由XX而来的.

来自于皇家荷兰贝壳 的这两家公司是什么时候成立的？

“荷兰皇家壳牌”这个公司是由哪两家公司组建的？