187877
It was available in the M39 lens mount , or " Leica thread mount " , a bayonet mount to fit early Zeiss Contax cameras .
 organization: Leica; organization: Zeiss
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: Leica, Zeiss 
Answer:
 organization: Leica; organization: Zeiss