The 3 sentence summary is: The document is a goodbye message from Croatian students who went on a school trip to visit places like Pula, Labin, and swim in the Adriatic Sea where they saw Roman ruins and a 1600 year old olive tree. They share photos from their trip and say goodbye to their friends, teachers and classmates, wishing them a good summer and saying they hope to see everyone again next year. The students each add their own personal goodbye message and smiley face.