Three people playing rock music, one of them is wearing a hat and a black pants with a black t-shirt and singing and playing the guitar does not mean that they  are performing at a rock concert.


Consider the statement "Three people playing rock music, one of them is wearing a hat and a black pants with a black t-shirt and singing and playing the guitar.". Based on this "Three young men are performing at a rock concert." a true statement? Yes, no, or I don't know?