MAKE name object
MAKE defines a variable using the name of the first input and assigns the second input as the value of that variable.
Once you have created the variable, you can get its contents by using :name. Think of the colon (:) as "the value of name".
? MAKE "NUMBER 73
? MAKE "COLOR "MAGENTA
? MAKE "CHOICE FIRST [A B C D]
? TO NAME.A.TREE
> PR [WHAT IS THE LATIN NAME OF THAT TREE?]
> MAKE "ANSWER READLIST
> PR SENTENCE :ANSWER [HAS RED LEAVES]
WHAT IS THE LATIN NAME OF THAT TREE?
? ACER ROBUSTUS
ACER ROBUSTUS HAS RED LEAVES