HTML survey import - how do you add text entry in multiple choice questions?

I want to create a multiple choice question where one of the options is free text entry (e.g. Other: __________). However, I am importing my survey from a .txt file. How do I write this command into the .txt file?



It currently looks like this:



[[Question:MC:SingleAnswer:Vertical]]



[[ID:Gender]]



What gender do you identify as?



[[Choices]]

Female

Male

Other <---- this is where I want text entry