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specifications of electric heater thermostats include temperature ranging from 50 degrees f to 80 degrees f , current ranging from 19 a to 22 a , & voltage ranging from 120 v to 277 v .
 component whole: heater, thermostats
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  heater, thermostats 
Answer:
 component whole: heater, thermostats