Complex sentence: Motti remembers an ex-girlfriend, Reli Eugenia, and looks her up on Facebook; upon seeing her son's picture, he decides to pass through Barcelona to find up whether he is the child's father; on the plane, he bumps into Itai.
Split into simpler sentences: Motti remembers an ex-girlfriend, Reli Eugenia, and looks her up on Facebook. Upon seeing her son's picture, he decides to pass through Barcelona to find up whether he is the child's father; on the plane, he bumps into Itai.