3976
In 1943 , he joined the student movement led by an underground party , then joined the Chinese Communist Party in April , 1946 , and graduated in 1947 from the department of Electric Engineering of Shanghai Jiaotong University .
 date: 1943; organization: the Chinese Communist Party; date: April , 1946; date: 1947; organization: Electric Engineering; organization: Shanghai Jiaotong University
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
 Entities: 1943, the Chinese Communist Party, April , 1946, 1947, Electric Engineering, Shanghai Jiaotong University 
Answer:
 date: 1943; organization: the Chinese Communist Party; date: April , 1946; date: 1947; organization: Electric Engineering; organization: Shanghai Jiaotong University