A couple of things to note though:
1.) OSINT is opensource intelligence - so, that would be social media and other stuff relating to that.
2.) Communications would be like cell phone conversations, etc.
3.) SIGINT is signals intelligence. You could talk about the possibility of individuals being meeting in a certain space at Churchill Downs or something like that.

All I need for you to do now is to make a word document and discuss why you chose each specific indicator and warning. If you could find some references, that would be great as well.