Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: Shell Oil Company is the United States-based subsidiary of Royal Dutch Shell .
A:
Shell Oil Company is the United States-based wholly owned subsidiary of Royal Dutch Shell , transnational corporation " oil major " of Anglo-Dutch origins , which is amongst the largest oil companies in the world .