6473
The baskets on the Big Board and CBOE -- which involve the actual S&P stocks , unlike the stock - index contracts currently traded on the Chicago futures markets , and index options on the CBOE -- will begin trading as critics step up their attacks on program trading and its contributions to the stock market 's wild price swings .
 organization: Big Board; organization: CBOE; organization: S&P; geographical social political: Chicago; organization: CBOE
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: Big Board, CBOE, S&P, Chicago, CBOE 
Answer:
 organization: Big Board; organization: CBOE; organization: S&P; geographical social political: Chicago; organization: CBOE