Men playing volleyball in the sand.
Mannen die volleybal spelen in het zand.
Men are playing volleyball.
Mannen spelen volleybal.
There is nothing in sentence 2 that cannot be inferred from sentence 1; in both cases, men are playing volleyball.
Er is niets in zin 2 dat niet kan worden afgeleid uit zin 1; in beide gevallen spelen mannen volleybal.