ExamplesR

class R{
    String r1;
    R r2;
    R(String r1, R r2){
        this.r1 = r1;
        this.r2 = r2;
    }

}
class ExamplesR{
    R agentA = new R("agent A", R);
    R agentB = new R("agent B", agentA);

}

// 1. The reason I don't think it was possible to construct an example of the R object is because 
//    R is not a dataype. It does not seem possible to create a new piece of data from a type that does 
//    not exist. 
// 2. I do think it would be possible to construct an example of a reply to a reply to a tweet given the current class 
//    structure on Drill3. I think it is possible because you could create a ReplyTweet object that takes another ReplyTweet object
//    as its argument and therefore replies to a reply, but it is impossible to do so before an object of that type is defined as is 
//   apparent in the above example