This poster is a piece of polish political satire. It reads "4th Polish Republic Is Arriving. Nurses! Do Not Come Back from Spain".

To exaplain this one needs to understand that Polish Nurses are getting paid good money to work in Spain and a lot of them have moved there as economi refugees because there are no well paying jobs in Poland for them. With the current polish administration viewed as right-wing, republican, family values, no work on sunday type of people this poster is urging polish nurses to stay in Spain instead. - Not very funny. Poland is obviously falling apart. It's becoming a place for "Winners Only".