They have no nationality, so we do not call them "American birds". They are "birds of America".

We could entitle a book Birds of America but when speaking of those birds as a group, we would use the definite article:

The birds of America include seed-eaters, insect-eaters, raptors, and scavengers.

But if we were speaking of an ornithological area of study, we might say:

"Birds of America" would be too broad a subject for a PhD dissertation. You will have to find a narrower topic. 

Articles before almost-abstract kind of nouns
Fate Core suggests one way to differentiate weapons and armor is by giving each one an Aspect. Daggers could be Quick, for instance, and maces could be Armor Piercing. I really like this idea. My question is, how would this actually work mechanically? I'm trying to picture how this would tie into "Creating an Advantage" or how it would modify attack rolls or shifts. 

A few examples to help fuel thinking caps:


Quick Dagger vs. Heavy Greatsword?
Long Spear vs. Balanced Longsword?


Any thoughts? 
