 Complete the following phrase:  In 1915, he opposed Yuans attempt to make himself emperor. He convinced his disciple Cai E, the military governor of Yun, to rebel. Progressive party branches agitated for the overthrow of Yuan and more provinces declared their independence. The revolutionary activity that he had frowned upon was utilized successfully. Besides Duan Qirui, Liang was the biggest advocate of entering World War I on the Allied side. He felt it would boost Chinas status and also ameliorate foreign debts. He condemned his mentor, Kang Youwei, for assisting in the 