Complex sentence: Ger made a surprise appearance at Dublin Airport on the 19th of May and came with the 4th year students of Belvedere College to Spain to cycle the Santiago de Compostela pilgrimage.
Split into simpler sentences: Ger made a surprise appearance at Dublin Airport on the 19th of May. He joined the 4th year students of Belvedere College to cycle the Santiago de Compostela pilgrimage.