16643
In 1905 , Albert Einstein theorized that this Brownian motion was caused by the water molecules continuously knocking the grains about , and developed a hypothetical mathematical model to describe it .
 person: Albert Einstein; person: Brownian
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: Albert Einstein, Brownian 
Answer:
 person: Albert Einstein; person: Brownian