Hello, I was able to export part of an expression clip, and it was exported as an .italk file. I was able to use that. 
I would like to do this again on another project, but I am only allowed that option on the first of three segments in that clip.
I want part of the third segment, and the option is not available. 
What is the difference between the first segment and the second or third? What must I do to the third segment in order to be able to export that expression clip?
Much thanks!