Dependent List from One Column

Hi, i am looking for a bit of help in regards to dependent lists. I have attached a sample workbook of the dependent lists i have created. The dropdown sheet shows the 2 dropdown lists that are sourced from the Qs Sheet C3:E8.

What i would like to find out is if it is possible to have dependent lists but using the format shown within H3:I18?

The reason being is the project that I am working on has 50 Main Queues and in total 700 Queues so it would be time consuming to change this into the format shown within C3:E8. If somebody could please help, would really appreciate it.

Thanks in advance.