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There are four types of chemical bonds : covalent bonds , in which compounds share one or more electron ( s ) ; ionic bonds , in which a compound donates one or more electrons to another compound to produce ions ( cations and anions ) ; hydrogen bonds ; and Van der Waals force bonds .
 person: Van der Waals
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 der Waals 
Answer:
 person: Van der Waals