Question: Which year did Alvin Cheng organize the rally with his schoolmates in support of the hong kong umbrella movement?

Related documents: [0]  [DOC] Alvin Cheng Kam-mun (, born 23 June 1988), also known as "4 Eyes Brother" (), is a Hong Kong student activist, active since 2014. He was a former student at Queensland University of Technology in Australia, and organised a rally with his schoolmates and Nardo Wai in support of the Hong Kong Umbrella Movement during the 2014 G20 Brisbane summit. His political opinions include the use of violence to fight against the police force. He is well known for participating in the Hong Kong Umbrella Movement, and establishing the student activism organization Student Front. [END] 
[1]  [DOC] The Umbrella Movement () is a political movement that emerged during the Hong Kong democracy protests of 2014. Its name arose from the use of umbrellas as a tool for passive resistance to the Hong Kong Police during the occupation which was sparked by the decision of the Standing Committee of the National People's Congress (NPCSC) of 31 August of that year which prescribed a selective pre-screening of candidates for election of the region's leader. [END]  
Answer: 2014
2014