By Mari Saito PRZEMYSL, Poland (Reuters) – Ukrainian mothers and their young children found shelter in an ornate theatre in the Polish border town of Przemysl on Saturday, where they were able to get some rest after their harrowing journey. For Tanya, a 34-year-old from Berdychiv in northern Ukraine, it was a relief to finally have some help with her five young children after their long trip to Poland. Tanya, who did not give her last name, had stayed in her home until it was no longer possible to shield her children from the war. “I tried to protect them from all of this. When the alarm sound…