101074
While other child psychologists had focused on use of techniques such as play therapy to identify the motives and causes of problematic behavior , Bijou used Skinner 's behavioral techniques to encourage positive behaviors through such rewards as praise , hugs and pieces of candy .
 person: Bijou; person: Skinner
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: Bijou, Skinner 
Answer:
 person: Bijou; person: Skinner