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At a private dinner Thursday , Drexel Burnham Lambert Inc. chief executive Frederick Joseph delivered a sobering message about the junk bond market to officials of Prudential Insurance Co. of America .
 date: Thursday; organization: Drexel Burnham Lambert Inc.; person: Frederick Joseph; organization: Prudential Insurance Co. of America
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: Thursday, Drexel Burnham Lambert Inc., Frederick Joseph, Prudential Insurance Co. of America 
Answer:
 date: Thursday; organization: Drexel Burnham Lambert Inc.; person: Frederick Joseph; organization: Prudential Insurance Co. of America