4094
Home Environment ( a latent variable constructed from information on mother ' s education and support of school work and extracurricular activities ) , and child blood lead concentration each had a main significant effect on cognition and behaviour .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None