Complex sentence: Meanwhile, Amy, Jonah, and Hamilton will head to Shanghai, China, to look into an exposition with many Ekats in attendance while Cara and Ian head to Ukraine to look into the Chernobyl disaster.
Split into simpler sentences: Meanwhile, Amy, Jonah, and Hamilton will head to Shanghai, China, to look into an exposition with many Ekats in attendance. And, Cara and Ian head to Ukraine to look into the Chernobyl disaster.