If you take your survey and then go into the admin module or download the data and go to export it, you can see exactly the names of how each open end question is being saved, but in general it would just be question_r#_c# when you have a grid question where each cell can have an answer.
So, if I had Q14_r1_c1, I can reference that anywhere in the survey by placing it in SSI Script tags, i.e. Tell me more about [%Q14_r1_c1%].
If want to use these as a list, however, you can't use any of the list-building functions (add if chosen, add if greater, etc.) because open-ends don't really qualify for any of that type of logic.
One work-around is to change them from open-ends to checkboxes, where each is selected to be an Other, Specify type answer. This will allow you to use the add if chose, AIC function, to pull each answer automatically into a constructed list.
A second option, if you are forcing 5 answers each time, would be to make a new list where the text of the first item would be [%Q14_r1_c1%], the text for the second item would be the next cell, and so forth.