content: Unhappy? At least two of them are smiling. One looks neutral/content. And only youngest looks concerned, not necessarily unhappy. Maybe she was told to "stand here look there" and is "processing instructions". Remember that in those days people hand't learned to constantly demonstrate those false saccharine grins they call "smiles" in the West. That is why East Europeans look grim to the Westerners. They are not grim - that is the normal human facial expression. It is the Westerners who have made constant forced grinning their second nature, so they are shocked when they see someone without that mask on. Shocked to see the actual face of the individual.