Complex sentence: On July 7,2015, hearings for the case begin with the Philippines asking the International Court of Arbitration at The Hague to invalidate China's claims during a hearing which was also attended by observers from Indonesia, Japan, Malaysia, Thailand, and Vietnam.
Split into simpler sentences: On July 7,2015, case hearings began with the Philippines asking the International Court of Arbitration at The Hague to invalidate China's claims. The hearings were also attended by observers from Indonesia, Japan, Malaysia, Thailand and Vietnam.