Definition: In this task, you will be given a passage, a question and a list of single-word events identified from the passage. The goal is to point out all events from the given event list that can answer the question. If a question is unanswerable or none of the events answer the question, output should be empty.
Input: Passage: A delegation of the Communist Party of China (CPC) headed by Liu Yunshan, member of the Political Bureau of the CPC Central Committee, arrived here on Saturday for a five-day official goodwill visit at the invitation of the Cambodian People's Party (CPP) and the royalist FUNCINPEC party. Liu and the delegation were greeted at the Siem Reap International Airport by senior leaders of the CPP and the FUNCINPEC, including CPP Secretary-General Say Chhum and Vice- Prime Minister and FUNCINPEC party Secretary-General Prince Norodom Sirivudh. Question: Who led the delegation before it was headed by Yunshan? Events: ['headed', 'arrived', 'visit', 'invitation', 'greeted']
Output: