Try this input a sprite with a variable and use this command line you can pick n choose which three you like Choose(1,2,3,4) or Random(1,2,3,4) or Floor(1,2,3,4) basically its a random number generator.
and then you have several condition such as IF variable value at say 3 then use the action to pull that dictionary value.
I prefer to code a random variable number generator and then putting a condition for each value. this Will help you to control the variable better and If you need to get the variable to do another action you can just put it with it.