25400
Contributions to botany In the late fifties , van Bruggen obtained from an aquarium-plant importer an Aponogeton species which he failed to be able to name using the existing literature .
 person: van Bruggen
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: van Bruggen 
Answer:
 person: van Bruggen