The relative pronoun and BE are frequently dropped before present and past participles and some adjectives, but sometimes it just does not seem right.
...it's about jobs. There are three million people unemployed. This is fine.
There are five people unemployed in that room. This appears strange, though it is possible if a manager is complaining about five workers who are just sitting around.
There are five people playing cards/exhausted/hungry in that room. Possible
There are five men white in that room. Not possible if we are referring to fair-skinned people - though just about possible if we are refering to terrified or flour-covered people.
The safest suggestion for learners, until they develop a feel for the constructions, is to use either an adjective+noun or a non-reduced relative clause:
There are x people who are unemployed...
There are x unemployed people..
Please do not start yet another thread on this. We do ask people to start different threads for different questions, but your questions are very closely related. We now have three or four threads going on almost identical points. You are very likely to receive confusing and conflicting answers in different threads.