Question: Not Alone, is Zhang Liyin's fourth overall single, released on August 20, 2014 in China and August 22 in South Korea,Zhang held a showcase to support the release of the single, which was held at the Century Theater in Beijing, guests at the said event include Kim Jong-dae, a South Korean singer-songwriter and actor, better known by which stage name?
{'answer': 'Chen', 'supporting_facts': [['Not Alone (Zhang Liyin song)', 6], ['Chen (singer)', 0]]}