75146
Crabtree , in 1978 , had previously suggested that Cu ( I ) is " the most likely candidate for a metallo-receptor site in olfaction " for strong-smelling volatiles which are also good metal-coordinating ligands , such as thiols .
 person: Crabtree
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: Crabtree 
Answer:
 person: Crabtree