>>211>>212It is a reference to a specific cinema though, it is the one we went to to watch the film.
You don't really understand the use of the definite article. When you say "there is only one of something" what this means is that there is only one noun, in this case only one group of warriors. Really there are more than one though, so you used the qualifier "that I joined," this takes you from one of the many groups to your group. You are specifying which group was very brave: the group you joined. In the first version of the story you don't say "that I joined" but since you used "the," we know you are taking about a specific group, the only group you had talked about to that point was the one you joined, so we can infer you are implying that is the group that is brave.
"Is John Somebody in one of the groups of warriors you know?"--here I am asking out of all of the groups you know, is this one guy in any of them. I am not taking about one thing, but a specific set of things.
I know of a group of warriors--I know of a random group of warriors, and I don't know if this is the same group that you know of or not, and it doesn't matter.
I know of the group of warriors--we are taking about a specific group now. Maybe it is one you were taking about, "do you know about the brave warriors from /lang/?"
An explanation of the church story:
Let's talk about town X. In town X there is more than one church. One (only one) of the churches in town X has a leaky roof. Some workmen from town X decide to fix the roof of the leaky church. These workmen find that they do not have the correct materials in town X to fix the church's leaky roof. So the workmen from town X travel to town Y which is three miles away from town X to get the materials they need to fix the roof of the church in town X.
Fixing of your three comments at the end:
We are taking about a random town that we just found out about so we use "a"
We are taking about the specific church that has a lealy roof so we use "the"
We are taking about the specific town the workmen went to to get materials so we use "the"
I hope this clarified things
>>213Theater and theatre are the same thing. Just like liter and litre. They are just spelling differences between regions. Like color and colour, realize and realise etc. They mean the same thing and everyone still understands what you are taking about.