283018
One of the first native British architects to design in a modernist style , he made numerous contacts with leading European architects while contributing to the Architects Journal in the 1930s , and in 1933 was secretary and founder member of the MARS Group .
 organization: MARS Group
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: MARS Group 
Answer:
 organization: MARS Group