Triple crown. Is the F1 part a Monaco win or a WDC?

[ajprice]

I've seen it defined both ways. Either way, Graham Hill did it and Alonso is 2 of 3 so far. So what do you see the triple crown as?

F1 Drivers Championship winner
Le Mans winner
Indy 500 winner

or

Monaco winner
Le Mans winner
Indy 500 winner